{"title":"Ronstan Blocks - Orbit Blocks","description":"","products":[{"product_id":"ronrf25109","title":"Ronstan Series 20 BB Orbit Block, Single, Lashing, Becket (RF25109)","description":"\u003cp\u003eThe incredible Series 20 Orbit Block™ is capable of loads up to 250kg (550lb) while weighing a mere 9 grams. It's so light that it needs to be lashed down.\u003c\/p\u003e\u003cp\u003eN.B. Block must be lashed through hub. M.W.L. \u0026amp; B.L. are dependent on the strength of lashing. Knots, splices, stitching will generally have a lower B.L. than the line itself.\u003c\/p\u003e\u003cp\u003eOur Part # RONRF25109 | Ronstan Part # RF25109\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49347535274290,"sku":"RONRF25109","price":15.43,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF25109.jpg?v=1735835535"},{"product_id":"ronrf35101","title":"Ronstan Series 30 BB OrbitBlock, Single, Lashing Head, Becket Option (RF35101)","description":"\u003cp\u003eBall Bearing Orbit Blocks boast the highest strength-to-weight ratio available. This is achieved through all-composite reinforced polymer materials and multiple attachment options. Their precision design provides the optimum number of ball bearings for minimum friction while weight reduction is achieved through the use of fibre-reinforced composites in the block head, cleat arms and beckets.\u003c\/p\u003e\u003cp\u003eMainsheet systems and spinnaker sheets on dinghies to 5 m (16 ft), halyard, vang and backstay applications on boats to 5 m (16 ft), control line applications on larger yachts.  Our Part # RONRF35101 | Ronstan Part # RF35101\u003c\/p\u003e\u003cp\u003eMainsheet systems and spinnaker sheets on dinghies to 5 m (16 ft), halyard, vang and backstay applications on boats to 5 m (16 ft), control line applications on larger yachts.\u003c\/p\u003e\u003cp\u003eOur Part # RONRF35101 | Ronstan Part # RF35101\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49347540418866,"sku":"RONRF35101","price":17.26,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF35101.jpg?v=1735835628"},{"product_id":"ronrf35151","title":"Ronstan Series 30 BB Orbit Block, Cheek (RF35151)","description":"\u003cp\u003eBall Bearing Orbit Blocks boast the highest strength-to-weight ratio available. This is achieved through all-composite reinforced polymer materials and multiple attachment options. Their precision design provides the optimum number of ball bearings for minimum friction while weight reduction is achieved through the use of fibre-reinforced composites in the block head, cleat arms and beckets.\u003c\/p\u003e\u003cp\u003eMainsheet systems and spinnaker sheets on dinghies to 5 m (16 ft), halyard, vang and backstay applications on boats to 5 m (16 ft), control line applications on larger yachts.  Our Part # RONRF35151 | Ronstan Part # RF35151\u003c\/p\u003e\u003cp\u003eMainsheet systems and spinnaker sheets on dinghies to 5 m (16 ft), halyard, vang and backstay applications on boats to 5 m (16 ft), control line applications on larger yachts.\u003c\/p\u003e\u003cp\u003eOur Part # RONRF35151 | Ronstan Part # RF35151\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49347556802866,"sku":"RONRF35151","price":19.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF35151.jpg?v=1735835709"},{"product_id":"ronrf35100","title":"Ronstan Series 30 BB OrbitBlock, Single, Swivel Shackle Head, Becket (RF35100)","description":"\u003cp\u003eBall Bearing Orbit Blocks boast the highest strength-to-weight ratio available. This is achieved through all-composite reinforced polymer materials and multiple attachment options. Their precision design provides the optimum number of ball bearings for minimum friction while weight reduction is achieved through the use of fibre-reinforced composites in the block head, cleat arms and beckets.\u003c\/p\u003e\u003cp\u003eMainsheet systems and spinnaker sheets on dinghies to 5 m (16 ft), halyard, vang and backstay applications on boats to 5 m (16 ft), control line applications on larger yachts.  Our Part # RONRF35100 | Ronstan Part # RF35100\u003c\/p\u003e\u003cp\u003eMainsheet systems and spinnaker sheets on dinghies to 5 m (16 ft), halyard, vang and backstay applications on boats to 5 m (16 ft), control line applications on larger yachts.\u003c\/p\u003e\u003cp\u003eOur Part # RONRF35100 | Ronstan Part # RF35100\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49347584688434,"sku":"RONRF35100","price":24.54,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF35100.jpg?v=1735835516"},{"product_id":"ronrf35141","title":"Ronstan Series 30 BB Orbit Block, Stand Up, Fixed Head (RF35141)","description":"\u003cp\u003eBall Bearing Orbit Blocks boast the highest strength-to-weight ratio available. This is achieved through all-composite reinforced polymer materials and multiple attachment options. Their precision design provides the optimum number of ball bearings for minimum friction while weight reduction is achieved through the use of fibre-reinforced composites in the block head, cleat arms and beckets.\u003c\/p\u003e\u003cp\u003eMainsheet systems and spinnaker sheets on dinghies to 5 m (16 ft), halyard, vang and backstay applications on boats to 5 m (16 ft), control line applications on larger yachts.  Our Part # RONRF35141 | Ronstan Part # RF35141\u003c\/p\u003e\u003cp\u003eMainsheet systems and spinnaker sheets on dinghies to 5 m (16 ft), halyard, vang and backstay applications on boats to 5 m (16 ft), control line applications on larger yachts.\u003c\/p\u003e\u003cp\u003eOur Part # RONRF35141 | Ronstan Part # RF35141\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49347621421362,"sku":"RONRF35141","price":28.18,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF35141.jpg?v=1735835425"},{"product_id":"ronrf35140","title":"Ronstan Series 30 BB Orbit Block, Stand Up, Swivel (RF35140)","description":"\u003cp\u003eBall Bearing Orbit Blocks boast the highest strength-to-weight ratio available. This is achieved through all-composite reinforced polymer materials and multiple attachment options. Their precision design provides the optimum number of ball bearings for minimum friction while weight reduction is achieved through the use of fibre-reinforced composites in the block head, cleat arms and beckets.\u003c\/p\u003e\u003cp\u003eMainsheet systems and spinnaker sheets on dinghies to 5 m (16 ft), halyard, vang and backstay applications on boats to 5 m (16 ft), control line applications on larger yachts.  Our Part # RONRF35140 | Ronstan Part # RF35140\u003c\/p\u003e\u003cp\u003eMainsheet systems and spinnaker sheets on dinghies to 5 m (16 ft), halyard, vang and backstay applications on boats to 5 m (16 ft), control line applications on larger yachts.\u003c\/p\u003e\u003cp\u003eOur Part # RONRF35140 | Ronstan Part # RF35140\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49347630956850,"sku":"RONRF35140","price":31.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF35140.jpg?v=1735835425"},{"product_id":"ronrf35101d","title":"Ronstan Series 30 Orbit Block, Single \u0026 Becket, Fixed Head (RF35101D)","description":"\u003cp\u003eBall Bearing Orbit Blocks boast the highest strength-to-weight ratio available. This is achieved through all-composite reinforced polymer materials and multiple attachment options.\u003c\/p\u003e\u003cp\u003eTheir precision design provides the optimum number of ball bearings for minimum friction while weight reduction is achieved through the use of fibre-reinforced composites in the block head, cleat arms and beckets.\u003c\/p\u003e\u003cp\u003eOur Part # RONRF35101D | Ronstan Part # RF35101D\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49347640656178,"sku":"RONRF35101D","price":32.77,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF35101D.jpg?v=1735835595"},{"product_id":"ronrf45151","title":"Ronstan Series 40 BB Orbit Block, Cheek (RF45151)","description":"\u003cp\u003eBall Bearing Orbit Blocks'boast the highest strength-to-weight ratio available. This is achieved through all-composite reinforced polymer materials and multiple attachment options. Their precision design provides the optimum number of ball bearings for minimum friction while weight reduction is achieved through the use of fibre-reinforced composites in the block head, cleat arms and beckets.\u003c\/p\u003e\u003cp\u003eMainsheet systems on spinnaker sheet on dinghies to 5 m (16 ft), spinnaker sheets on dinghies, sportsboats and small keel boats to 5 m (16 ft), halyard, vang and backstay applications on boats to 8 m (26 ft), control line applications on larger yachts.Our Part # RONRF45151 | Ronstan Part # RF45151\u003c\/p\u003e\u003cp\u003eMainsheet systems on spinnaker sheet on dinghies to 5 m (16 ft), spinnaker sheets on dinghies, sportsboats and small keel boats to 5 m (16 ft), halyard, vang and backstay applications on boats to 8 m (26 ft), control line applications on larger yachts.\u003c\/p\u003e\u003cp\u003eOur Part # RONRF45151 | Ronstan Part # RF45151\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49347645145394,"sku":"RONRF45151","price":33.71,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF45151_7f42fb18-3aeb-43a2-9f96-aabc87a68d1b.jpg?v=1737036631"},{"product_id":"ronrf35100a","title":"Ronstan Series 30 BB Orbit Block, Single Slotted Head Post (RF35100A)","description":"\u003cp\u003eBall Bearing Orbit Blocks boast the highest strength-to-weight ratio available. This is achieved through all-composite reinforced polymer materials and multiple attachment options. Their precision design provides the optimum number of ball bearings for minimum friction while weight reduction is achieved through the use of fibre-reinforced composites in the block head, cleat arms and beckets.\u003c\/p\u003e\u003cp\u003eMainsheet systems and spinnaker sheets on dinghies to 5 m (16 ft), halyard, vang and backstay applications on boats to 5 m (16 ft), control line applications on larger yachts.  Our Part # RONRF35100A | Ronstan Part # RF35100A\u003c\/p\u003e\u003cp\u003eMainsheet systems and spinnaker sheets on dinghies to 5 m (16 ft), halyard, vang and backstay applications on boats to 5 m (16 ft), control line applications on larger yachts.\u003c\/p\u003e\u003cp\u003eOur Part # RONRF35100A | Ronstan Part # RF35100A\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49347645243698,"sku":"RONRF35100A","price":33.71,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF35100A.jpg?v=1735835522"},{"product_id":"ronrf45110","title":"Ronstan Series 40 BB Orbit Block, Single, Becket, Swivel Head (RF45110)","description":"\u003cp\u003eBall Bearing Orbit Blocks'boast the highest strength-to-weight ratio available. This is achieved through all-composite reinforced polymer materials and multiple attachment options. Their precision design provides the optimum number of ball bearings for minimum friction while weight reduction is achieved through the use of fibre-reinforced composites in the block head, cleat arms and beckets.\u003c\/p\u003e\u003cp\u003eMainsheet systems on spinnaker sheet on dinghies to 5 m (16 ft), spinnaker sheets on dinghies, sportsboats and small keel boats to 5 m (16 ft), halyard, vang and backstay applications on boats to 8 m (26 ft), control line applications on larger yachts. Our Part # RONRF45110 | Ronstan Part # RF45110\u003c\/p\u003e\u003cp\u003eMainsheet systems on spinnaker sheet on dinghies to 5 m (16 ft), spinnaker sheets on dinghies, sportsboats and small keel boats to 5 m (16 ft), halyard, vang and backstay applications on boats to 8 m (26 ft), control line applications on larger yachts.\u003c\/p\u003e\u003cp\u003eOur Part # RONRF45110 | Ronstan Part # RF45110\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49347645342002,"sku":"RONRF45110","price":34.55,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF45110.jpg?v=1735835541"},{"product_id":"ronrf45101","title":"Ronstan Series 40 BB Orbit Block, Single, Link Head (RF45101)","description":"\u003cp\u003eLightweight\u003c\/p\u003e\u003cp\u003eKilogram for kilogram of working load, BB and RT Orbit Blocks's are the world's lightest. The unique orbital design allows the bearing to only be in the active areas of the floating sheave. This minimises the mass of the inactive return race and hub. Weight and bulk are further reduced in the different block configurations. The ball bearing single and becket block has a through-sheave becket arrangement. The result? The lowest weight possible. Multi-sheave blocks have only single intermediate cheeks and an ultra-light and efficient head arrangement. This gives a 30% weight saving advantage over the nearest competitor. Other brands just link together their single blocks. This results in unnecessary double cheeks between each sheave, held together by a heavy steel channel across the top of the block.\u003c\/p\u003e\u003cp\u003eHighest working load in its class\u003c\/p\u003e\u003cp\u003eThe orbital ball-bearing arrangement gives the largest possible bearing race diameter. This maximises load performance. The proven Ronstan 2-stage bearing system features high compression grade acetal ball bearings and a secondary full-contact bearing. This gives minimum friction across the full working load range.\u003c\/p\u003e\u003cp\u003eDyneema link specialties\u003c\/p\u003e\u003cp\u003eTo gain peak performance, we engineered out the heavy steel load straps, head post, shackle, full-length fasteners, and cleating accessories. Through extensive research and development, we replaced virtually all metal components with high-tech polymers and fibre equivalents. The Dyneema Link is produced from FSE Robline SK75 fibre, which is 10 times stronger and lighter than steel, and provides the final connection from the block to the load point.\u003c\/p\u003e\u003cp\u003eOur Part # RONRF45101 | Ronstan Part # RF45101\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49347645505842,"sku":"RONRF45101","price":33.71,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF45101.jpg?v=1728016065"},{"product_id":"ronrf48109","title":"Ronstan S40 BB Orbit Block,Single,Becket Option,Lashing (RF48109)","description":"\u003cp\u003eThe new Series 40 ball bearing Orbit Blocks provide the perfect balance of strength, performance, and reliability. They offer class-leading dynamic and static load ratings, the highest available in this size of performance blocks. Lightweight and strong toughened glass fibre reinforced nylon cheeks replace stainless steel straps used in traditional utility blocks - the perfect balance of performance and reliability. As well as traditional single swivel blocks, the range also includes single and double sheave lashing or soft attachment options through to multiple sheave blocks including those with quad and quin sheaves. The range is extremely versatile allowing a multitude of possible systems right up to a 12:1 purchase mainsheet system for off-the-beach performance catamarans.\u003c\/p\u003e\u003cp\u003eBall Bearing versions incorporate our 2-stage bearing system using ball bearings to minimise friction and a secondary full-contact bearing to maintain low friction across the full working load range.\u003c\/p\u003e\u003cp\u003eOur Part # RONRF48109| Ronstan Part # RF48109\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49347654058290,"sku":"RONRF48109","price":35.16,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF48109.jpg?v=1728052517"},{"product_id":"ronrf35100d","title":"Ronstan Series 30 OrbitBlock, Single, Swivel Shackle Head, Becket (RF35100D)","description":"\u003cp\u003eBall Bearing Orbit Blocks boast the highest strength-to-weight ratio available. This is achieved through all-composite reinforced polymer materials and multiple attachment options.\u003c\/p\u003e\u003cp\u003eTheir precision design provides the optimum number of ball bearings for minimum friction while weight reduction is achieved through the use of fibre-reinforced composites in the block head, cleat arms and beckets.\u003c\/p\u003e\u003cp\u003eOur Part # RONRF35100D | Ronstan Part # RF35100D\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49347684073778,"sku":"RONRF35100D","price":39.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF35100D.jpg?v=1735835498"},{"product_id":"ronrf35202","title":"Ronstan Series 30 BB Orbit Block, Double (RF35202)","description":"\u003cp\u003eBall Bearing Orbit Blocks boast the highest strength-to-weight ratio available. This is achieved through all-composite reinforced polymer materials and multiple attachment options. Their precision design provides the optimum number of ball bearings for minimum friction while weight reduction is achieved through the use of fibre-reinforced composites in the block head, cleat arms and beckets.\u003c\/p\u003e\u003cp\u003eMainsheet systems and spinnaker sheets on dinghies to 5 m (16 ft), halyard, vang and backstay applications on boats to 5 m (16 ft), control line applications on larger yachts.  Our Part # RONRF35202 | Ronstan Part # RF35202\u003c\/p\u003e\u003cp\u003eMainsheet systems and spinnaker sheets on dinghies to 5 m (16 ft), halyard, vang and backstay applications on boats to 5 m (16 ft), control line applications on larger yachts.\u003c\/p\u003e\u003cp\u003eOur Part # RONRF35202 | Ronstan Part # RF35202\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49347701506354,"sku":"RONRF35202","price":40.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF35202.jpg?v=1735835691"},{"product_id":"ronrf35212","title":"Ronstan Series 30 BB Orbit Block, Double, Becket (RF35212)","description":"\u003cp\u003eBall Bearing Orbit Blocks boast the highest strength-to-weight ratio available. This is achieved through all-composite reinforced polymer materials and multiple attachment options. Their precision design provides the optimum number of ball bearings for minimum friction while weight reduction is achieved through the use of fibre-reinforced composites in the block head, cleat arms and beckets.\u003c\/p\u003e\u003cp\u003eMainsheet systems and spinnaker sheets on dinghies to 5 m (16 ft), halyard, vang and backstay applications on boats to 5 m (16 ft), control line applications on larger yachts.  Our Part # RONRF35212 | Ronstan Part # RF35212\u003c\/p\u003e\u003cp\u003eMainsheet systems and spinnaker sheets on dinghies to 5 m (16 ft), halyard, vang and backstay applications on boats to 5 m (16 ft), control line applications on larger yachts.\u003c\/p\u003e\u003cp\u003eOur Part # RONRF35212 | Ronstan Part # RF35212\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49347714384178,"sku":"RONRF35212","price":43.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF35212.jpg?v=1735835716"},{"product_id":"ronrf45140","title":"Ronstan Series 40 BB Orbit Block, Single, Stand-Up Swivel Head (RF45140)","description":"\u003cp\u003eThe Ronstan Series 40 BB Orbit Block, Single, Stand-Up Swivel Head #RF45140 is a game-changer for sailors seeking lightweight and efficient performance. With its innovative design that keeps weight to a minimum without sacrificing strength, it's perfect for various sailing applications. This block is engineered to offer maximum load capacity with minimal friction, making it an ideal choice for enthusiasts and professionals alike.\u003c\/p\u003e\u003cp\u003eCrafted using advanced materials, this orbit block features high compression strength carbon black Acetal ball bearings and a glass fiber reinforced, MoS2 impregnated nylon stage 2 bearing. The frame and cheeks are made from toughened, glass fiber reinforced nylon, while the sheave incorporates carbon fiber reinforced, PTFE impregnated nylon. It is tailored for mainsheet systems and spinnaker sheets on dinghies, sportsboats, and small keelboats up to 5 meters, as well as halyard, vang, and backstay applications on boats up to 8 meters.\u003c\/p\u003e\u003cp\u003eUsage\u003c\/p\u003e\u003cp\u003eIdeal for mainsheet systems on spinnaker sheets for dinghies to 5m, this versatile block is also suited for spinnaker sheets on sportsboats and small keelboats. It’s perfect for halyard, vang, and backstay applications on larger boats, ensuring reliability and performance.\u003c\/p\u003e\u003cp\u003eOur Part #RONRF45140 | Mfr. Part #RF45140\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49347755901234,"sku":"RONRF45140","price":54.58,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF45140.jpg?v=1735835534"},{"product_id":"ronrf55110","title":"Ronstan Series 55 BB Orbit Block, Single Becket Swivel (RF55110)","description":"\u003cp\u003eThe Ronstan Series 55 BB Orbit Block, Single Becket Swivel #RF55110 is the ideal choice for sailors seeking lightweight efficiency and strength. Its unique orbital design minimizes unnecessary weight, ensuring high performance even under heavy loads. This product stands out for its innovative ball-bearing system and robust materials, making it a reliable option for a variety of sailing needs.\u003c\/p\u003e\u003cp\u003eThis block features materials like high compression strength carbon black Acetal ball bearings and carbon fiber reinforced, PTFE impregnated Nylon for durability. The frame and cheeks are made from toughened, glass fiber-reinforced Nylon, while the rope link is UV stabilized Dyneema®. Ideal for mainsheet systems, halyards, vangs, and backstays on boats up to 9m, it offers a 30% weight-saving advantage over competitors. It's perfectly suited for control line applications on larger yachts as well.\u003c\/p\u003e\u003cp\u003eUsage\u003c\/p\u003e\u003cp\u003ePerfect for mainsheet systems and spinnaker sheets on dinghies, sportsboats, and small keelboats up to 9m (30ft). Also ideal for halyard, vang, and backstay applications on boats up to 8m (26ft), providing reliable performance in a variety of sailing scenarios.\u003c\/p\u003e\u003cp\u003eOur Part #RONRF55110 | Mfr. Part #RF55110\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49347755966770,"sku":"RONRF55110","price":50.58,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF55110.jpg?v=1735835477"},{"product_id":"ronrf48100","title":"Ronstan S40 BB Orbit Block,Single,Becket,Swivel Head (RF48100)","description":"\u003cp\u003eThe new Series 40 ball bearing Orbit Blocks provide the perfect balance of strength, performance, and reliability. They offer class-leading dynamic and static load ratings, the highest available in this size of performance blocks. Lightweight and strong toughened glass fibre reinforced nylon cheeks replace stainless steel straps used in traditional utility blocks - the perfect balance of performance and reliability.\u003c\/p\u003e\u003cp\u003eThe RF48100 Single Block features a 40mm (1 9\/16\") sheave and incorporates our 2-stage bearing system. Ball bearings minimise friction while a secondary full-contact bearing maintains low friction across the full working load range. This product does not have a locking headpost, which is only available in the multiple sheave variants. RF48100 is free swivel rotation only.\u003c\/p\u003e\u003cp\u003eOur Part # RONRF48100| Ronstan Part # RF48100\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49347761733938,"sku":"RONRF48100","price":40.92,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF48100.jpg?v=1728034015"},{"product_id":"ronrf35302","title":"Ronstan Series 30 BB Orbit Block, Triple (RF35302)","description":"\u003cp\u003eBall Bearing Orbit Blocks boast the highest strength-to-weight ratio available. This is achieved through all-composite reinforced polymer materials and multiple attachment options. Their precision design provides the optimum number of ball bearings for minimum friction while weight reduction is achieved through the use of fibre-reinforced composites in the block head, cleat arms and beckets.\u003c\/p\u003e\u003cp\u003eMainsheet systems and spinnaker sheets on dinghies to 5 m (16 ft), halyard, vang and backstay applications on boats to 5 m (16 ft), control line applications on larger yachts.  Our Part # RONRF35302 | Ronstan Part # RF35302\u003c\/p\u003e\u003cp\u003eMainsheet systems and spinnaker sheets on dinghies to 5 m (16 ft), halyard, vang and backstay applications on boats to 5 m (16 ft), control line applications on larger yachts.\u003c\/p\u003e\u003cp\u003eOur Part # RONRF35302 | Ronstan Part # RF35302\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49347774677298,"sku":"RONRF35302","price":55.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF35302.jpg?v=1735835404"},{"product_id":"ronrf35312","title":"Ronstan Series 30 BB Orbit Block, Triple, Becket (RF35312)","description":"\u003cp\u003eBall Bearing Orbit Blocks boast the highest strength-to-weight ratio available. This is achieved through all-composite reinforced polymer materials and multiple attachment options. Their precision design provides the optimum number of ball bearings for minimum friction while weight reduction is achieved through the use of fibre-reinforced composites in the block head, cleat arms and beckets.\u003c\/p\u003e\u003cp\u003eMainsheet systems and spinnaker sheets on dinghies to 5 m (16 ft), halyard, vang and backstay applications on boats to 5 m (16 ft), control line applications on larger yachts.  Our Part # RONRF35312 | Ronstan Part # RF35312\u003c\/p\u003e\u003cp\u003eMainsheet systems and spinnaker sheets on dinghies to 5 m (16 ft), halyard, vang and backstay applications on boats to 5 m (16 ft), control line applications on larger yachts.\u003c\/p\u003e\u003cp\u003eOur Part # RONRF35312 | Ronstan Part # RF35312\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49347789979954,"sku":"RONRF35312","price":57.81,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF35312.jpg?v=1735835411"},{"product_id":"ronrf35284","title":"Ronstan Series 30 BB Orbit Block, Linked (RF35284)","description":"\u003cp\u003eBall Bearing Orbit Blocks boast the highest strength-to-weight ratio available. This is achieved through all-composite reinforced polymer materials and multiple attachment options. Their precision design provides the optimum number of ball bearings for minimum friction while weight reduction is achieved through the use of fibre-reinforced composites in the block head, cleat arms and beckets.\u003c\/p\u003e\u003cp\u003eMainsheet systems and spinnaker sheets on dinghies to 5 m (16 ft), halyard, vang and backstay applications on boats to 5 m (16 ft), control line applications on larger yachts.  Our Part # RONRF35284 | Ronstan Part # RF35284\u003c\/p\u003e\u003cp\u003eMainsheet systems and spinnaker sheets on dinghies to 5 m (16 ft), halyard, vang and backstay applications on boats to 5 m (16 ft), control line applications on larger yachts.\u003c\/p\u003e\u003cp\u003eOur Part # RONRF35284 | Ronstan Part # RF35284\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49347813769522,"sku":"RONRF35284","price":42.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF35284.jpg?v=1735835621"},{"product_id":"ronrf48140","title":"Ronstan S40 BB Orbit Block,Single,Stand-Up (RF48140)","description":"\u003cp\u003eThe new Series 40 ball bearing Orbit Blocks provide the perfect balance of strength, performance, and reliability. They offer class-leading dynamic and static load ratings, the highest available in this size of performance blocks. Lightweight and strong toughened glass fibre reinforced nylon cheeks replace stainless steel straps used in traditional utility blocks - the perfect balance of performance and reliability. As well as traditional single swivel blocks, the range also includes single and double sheave lashing or soft attachment options through to multiple sheave blocks including those with quad and quin sheaves. The range is extremely versatile allowing a multitude of possible systems right up to a 12:1 purchase mainsheet system for off-the-beach performance catamarans. Ball Bearing versions incorporate our 2-stage bearing system using ball bearings to minimise friction and a secondary full-contact bearing to maintain low friction across the full working load range.\u003c\/p\u003e\u003cp\u003eOur Part # RONRF48140| Ronstan Part # RF48140\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49347819602226,"sku":"RONRF48140","price":50.63,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF48140.jpg?v=1728061888"},{"product_id":"ronrf48209","title":"Ronstan S40 BB Orbit Block,Double,Becket Option,Lashing (RF48209)","description":"\u003cp\u003eThe new Series 40 ball bearing Orbit Blocks provide the perfect balance of strength, performance, and reliability. They offer class-leading dynamic and static load ratings, the highest available in this size of performance blocks. Lightweight and strong toughened glass fibre reinforced nylon cheeks replace stainless steel straps used in traditional utility blocks - the perfect balance of performance and reliability. As well as traditional single swivel blocks, the range also includes single and double sheave lashing or soft attachment options through to multiple sheave blocks including those with quad and quin sheaves. The range is extremely versatile allowing a multitude of possible systems right up to a 12:1 purchase mainsheet system for off-the-beach performance catamarans.\u003c\/p\u003e\u003cp\u003eBall Bearing versions incorporate our 2-stage bearing system using ball bearings to minimise friction and a secondary full-contact bearing to maintain low friction across the full working load range.\u003c\/p\u003e\u003cp\u003eOur Part # RONRF48209| Ronstan Part # RF48209\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49347831693618,"sku":"RONRF48209","price":68.54,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF48209.jpg?v=1728061276"},{"product_id":"ron-rf55510","title":"Ronstan Series 55 BB Orbit Block, Fiddle Becket Swivel (RF55510)","description":"\u003cp\u003eLightweight\u003c\/p\u003e\u003cp\u003eKilogram for kilogram of working load, BB and RT Orbit Blocks™ are the world's lightest. The unique orbital design allows the bearing to only be in the active areas of the floating sheave. This minimises the mass of the inactive return race and hub.\u003c\/p\u003e\u003cp\u003eWeight and bulk are further reduced in the different block configurations. The ball bearing single and becket block has a through-sheave becket arrangement. The result? The lowest weight possible.\u003c\/p\u003e\u003cp\u003eMulti-sheave blocks have only single intermediate cheeks and an ultra-light and efficient head arrangement. This gives a 30% weight saving advantage over the nearest competitor. Other brands just link together their single blocks. This results in unnecessary double cheeks between each sheave, held together by a heavy steel channel across the top of the block.\u003c\/p\u003e\u003cp\u003eThe orbital ball-bearing arrangement gives the largest possible bearing race diameter. This maximises load performance. The proven Ronstan 2-stage bearing system features high compression grade acetal ball bearings and a secondary full-contact bearing. This gives minimum friction across the full working load range.\u003c\/p\u003e\u003cp\u003eThe floating sheave and bearing system is supported by a fibre-reinforced load frame. The design was computer modelled to be stress optimised. The Dyneema® Link is produced from FSE Robline SK75 fibre, which is 10 times stronger and lighter than steel, and provides the final connection from the block to the load point.\u003c\/p\u003e\u003cp\u003eOur Part # RON-RF55510 | Ronstan Part # RF55510\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49347847127346,"sku":"RON-RF55510","price":72.26,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RON-RF55510.jpg?v=1728057809"},{"product_id":"ronrf48151","title":"Ronstan S40 BB Orbit Block,Cheek (RF48151)","description":"\u003cp\u003eThe new Series 40 ball bearing Orbit Blocks provide the perfect balance of strength, performance, and reliability. They offer class-leading dynamic and static load ratings, the highest available in this size of performance blocks. Lightweight and strong toughened glass fibre reinforced nylon cheeks replace stainless steel straps used in traditional utility blocks - the perfect balance of performance and reliability. The sheave incorporate our 2-stage bearing system using ball bearings to minimise friction and a secondary full-contact bearing to maintain low friction across the full working load range.\u003c\/p\u003e\u003cp\u003eOur Part # RONRF48151| Ronstan Part # RF48151\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49347879305522,"sku":"RONRF48151","price":58.13,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF48151.jpg?v=1728056000"},{"product_id":"ronrf55171","title":"Ronstan Series 55 BB Orbit Block, Upright Lead (RF55171)","description":"\u003cp\u003eThe Ronstan Series 55 BB Orbit Block, Upright Lead #RF55171 is your go-to for efficient and lightweight sailing performance. It's designed with a unique orbital ball-bearing system, making it perfect for those who need reliable lead blocks. Even though it's built to handle heavy loads, it remains incredibly light and easy to use.\u003c\/p\u003e\u003cp\u003eConstructed from high-quality materials, including a toughened, glass fibre reinforced Nylon frame and cheeks, and a carbon fibre reinforced, PTFE impregnated Nylon sheave, this block is made for durability and performance. The head fitting is crafted from Grade 316 stainless steel, ensuring longevity. This block is ideal for use in mainsheet systems and spinnaker sheets on dinghies, sportsboats, and small keelboats up to 9m.\u003c\/p\u003e\u003cp\u003eUsage\u003c\/p\u003e\u003cp\u003ePerfect for mainsheet and spinnaker sheet systems on dinghies, sportsboats, and small keelboats to 9m. It’s also suitable for halyard, vang, and backstay applications on boats up to 8m, as well as control line applications on larger yachts.\u003c\/p\u003e\u003cp\u003eOur Part #RONRF55171 | Mfr. Part #RF55171\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49347912761650,"sku":"RONRF55171","price":65.54,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF55171.jpg?v=1735835590"},{"product_id":"ronrf56151a","title":"Ronstan Series 55 RT Orbit Block, Cheek Anti-Clockwise Rotatio (RF56151A)","description":"\u003cp\u003eThe Ronstan Series 55 RT Orbit Block, Cheek Anti-Clockwise Rotation #RF56151A is a versatile block perfect for sailors who value both convenience and performance. With its unique automatic ratchet and manual engagement modes, this block offers unmatched holding power and adaptability for various sailing conditions. It's designed for those who appreciate effortless ease and reliability on the water.\u003c\/p\u003e\u003cp\u003eCrafted with precision, the block features an anodised aluminium sheave and high compression strength carbon black Acetal ball bearings for durability. The frame and cheeks are made from toughened glass fibre reinforced nylon, while the rope link uses UV-stabilised, multi-strand impregnated SK75 Dyneema®. Its innovative design reduces rope wear and enhances performance, making it an excellent choice for competitive and recreational sailing.\u003c\/p\u003e\u003cp\u003eUsage\u003c\/p\u003e\u003cp\u003eIdeal for use in mainsheet systems and for gybing asymmetric spinnakers, providing smooth and controlled sheet movement in various sailing scenarios.\u003c\/p\u003e\u003cp\u003eOur Part #RONRF56151A | Mfr. Part #RF56151A\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49347920625970,"sku":"RONRF56151A","price":85.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF56151A.jpg?v=1735835722"},{"product_id":"ronrf56151","title":"Ronstan Series 55 RT Orbit Block, Cheek, Clockwise Rotation (RF56151)","description":"\u003cp\u003eThe Ronstan Series 55 RT Orbit Block, Cheek, Clockwise Rotation #RF56151 is a versatile tool for sailors, offering both automatic and manual ratchet modes for optimal control. Enjoy the highest holding power in the market with a unique sheave design that ensures excellent grip and reduces rope wear. This orbit block is perfect for those seeking reliable and efficient sailing performance.\u003c\/p\u003e\u003cp\u003eCrafted with anodised aluminium and fortified with high compression carbon black Acetal ball bearings, this orbit block is as strong as it is efficient. The frame and cheeks are made from toughened, glass fibre reinforced nylon, ensuring durability in demanding conditions. Perfect for sailors seeking optimal performance, this block's unique design minimizes rope wear while maximizing grip.\u003c\/p\u003e\u003cp\u003eOur Part #RONRF56151 | Mfr. Part #RF56151\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49347920724274,"sku":"RONRF56151","price":85.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF56151.jpg?v=1735835737"},{"product_id":"ronrf46151a","title":"Ronstan Series 40 RTA OrbitBlock, Cheek, Anti-Clockwise Rotation (RF46151A)","description":"\u003cp\u003eThe OrbitBlock #RF46151A is your go-to choice for strength and efficiency in sailing. It's designed with lightweight, reinforced polymer materials, ensuring durability and easy handling on the water. This cheek block is great for those looking to optimize their sailing gear without the fuss.\u003c\/p\u003e\u003cp\u003eThe OrbitBlock is made from advanced composite materials, enhancing both strength and weight reduction. It features fiber-reinforced composite elements in critical areas like the block head and cleat arms. This makes it compatible with various sailing systems, including dinghy mainsheet systems and modern asymmetric classes. Technical specs include its adaptable attachment options and ability to integrate seamlessly with other sailing gear.\u003c\/p\u003e\u003cp\u003eUsage\u003c\/p\u003e\u003cp\u003eIdeal for dinghy mainsheet systems, fine-tuning on sportsboats, and control lines on larger yachts. It's especially suited for spinnaker and jib sheets on modern asymmetric classes.\u003c\/p\u003e\u003cp\u003eOur Part #RONRF46151A | Mfr. Part #RF46151A\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49347931275570,"sku":"RONRF46151A","price":77.33,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF46151A.jpg?v=1735835689"},{"product_id":"ronrf35286","title":"Ronstan Series 30 BB Orbit Block, Clew Ring Linked (RF35286)","description":"\u003cp\u003eBall Bearing Orbit Blocks boast the highest strength-to-weight ratio available. This is achieved through all-composite reinforced polymer materials and multiple attachment options. Their precision design provides the optimum number of ball bearings for minimum friction while weight reduction is achieved through the use of fibre-reinforced composites in the block head, cleat arms and beckets.\u003c\/p\u003e\u003cp\u003eMainsheet systems and spinnaker sheets on dinghies to 5 m (16 ft), halyard, vang and backstay applications on boats to 5 m (16 ft), control line applications on larger yachts.  Our Part # RONRF35286 | Ronstan Part # RF35286\u003c\/p\u003e\u003cp\u003eMainsheet systems and spinnaker sheets on dinghies to 5 m (16 ft), halyard, vang and backstay applications on boats to 5 m (16 ft), control line applications on larger yachts.\u003c\/p\u003e\u003cp\u003eOur Part # RONRF35286 | Ronstan Part # RF35286\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49347934912818,"sku":"RONRF35286","price":52.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF35286.jpg?v=1735835620"},{"product_id":"ronrf35322","title":"Ronstan Series 30 BB Orbit Block, Triple, Cleat (RF35322)","description":"\u003cp\u003eBall Bearing Orbit Blocks boast the highest strength-to-weight ratio available. This is achieved through all-composite reinforced polymer materials and multiple attachment options. Their precision design provides the optimum number of ball bearings for minimum friction while weight reduction is achieved through the use of fibre-reinforced composites in the block head, cleat arms and beckets.\u003c\/p\u003e\u003cp\u003eMainsheet systems and spinnaker sheets on dinghies to 5 m (16 ft), halyard, vang and backstay applications on boats to 5 m (16 ft), control line applications on larger yachts.  Our Part # RONRF35322 | Ronstan Part # RF35322\u003c\/p\u003e\u003cp\u003eMainsheet systems and spinnaker sheets on dinghies to 5 m (16 ft), halyard, vang and backstay applications on boats to 5 m (16 ft), control line applications on larger yachts.\u003c\/p\u003e\u003cp\u003eOur Part # RONRF35322 | Ronstan Part # RF35322\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49347945038130,"sku":"RONRF35322","price":92.74,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF35322.jpg?v=1735835393"},{"product_id":"ronrf35332","title":"Ronstan Series 30 BB Orbit Block, Triple, Becket, Cleat (RF35332)","description":"\u003cp\u003eBall Bearing Orbit Blocks boast the highest strength-to-weight ratio available. This is achieved through all-composite reinforced polymer materials and multiple attachment options. Their precision design provides the optimum number of ball bearings for minimum friction while weight reduction is achieved through the use of fibre-reinforced composites in the block head, cleat arms and beckets.\u003c\/p\u003e\u003cp\u003eMainsheet systems and spinnaker sheets on dinghies to 5 m (16 ft), halyard, vang and backstay applications on boats to 5 m (16 ft), control line applications on larger yachts.  Our Part # RONRF35332 | Ronstan Part # RF35332\u003c\/p\u003e\u003cp\u003eMainsheet systems and spinnaker sheets on dinghies to 5 m (16 ft), halyard, vang and backstay applications on boats to 5 m (16 ft), control line applications on larger yachts.\u003c\/p\u003e\u003cp\u003eOur Part # RONRF35332 | Ronstan Part # RF35332\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49347952410930,"sku":"RONRF35332","price":93.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF35332.jpg?v=1735835412"},{"product_id":"ronrf46151","title":"Ronstan Series 40 RTA OrbitBlock, Cheek, Clockwise Rotation (RF46151)","description":"\u003cp\u003eThe Ronstan Series 40 RTA OrbitBlock, Cheek, Clockwise Rotation #RF46151 is a top choice for sailors looking for efficiency and reliability. Its innovative design combines lightweight materials with high strength, making it ideal for various sailing applications. Enjoy smooth sailing with minimal friction thanks to its precision-engineered ball bearings.\u003c\/p\u003e\u003cp\u003eConstructed with all-composite reinforced polymer materials, this ronstan cheek block offers durability without the bulk. The block head, cleat arms, and beckets are crafted from fibre-reinforced composites to minimize weight. It's perfect for dinghy mainsheet systems, sportsboats, and larger yachts, especially in modern asymmetric classes.\u003c\/p\u003e\u003cp\u003eUsage\u003c\/p\u003e\u003cp\u003eIdeal for dinghy mainsheet systems, fine-tune systems on sportsboats and small keelboats, and spinnaker and jib sheets. It's also great for control line applications on larger yachts, providing maximum efficiency in a variety of sailing scenarios.\u003c\/p\u003e\u003cp\u003eOur Part #RONRF46151 | Mfr. Part #RF46151\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49347959521586,"sku":"RONRF46151","price":77.33,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF46151.jpg?v=1735835715"},{"product_id":"ronrf55151","title":"Ronstan Series 55 BB Orbit Block, Cheek (RF55151)","description":"\u003cp\u003eLight Weight:Kilogram for kilogram of working load, BB and RT Orbit Block™ are the world's lightest. The unique orbital design allows the bearing to only be in the active areas of the floating sheave. This minimises the mass of the inactive return race and hub.Weight: and bulk are further reduced in the different block configurations. The ball bearing single and becket block has a through-sheave becket arrangement. The result? The lowest Weight: possible.Multi-sheave blocks have only single intermediate cheeks and an ultra-light and efficient head arrangement. This gives a 30% Weight: saving advantage over the nearest competitor. Other brands just link together their single blocks. This results in unnecessary double cheeks between each sheave, held together by a heavy steel channel across the top of the block.Highest working load in its class:The orbital ball-bearing arrangement gives the largest possible bearing race diameter. This maximises load performance. The proven Ronstan 2-stage bearing system features high compression grade acetal ball bearings and a secondary full-contact bearing. This gives minimum friction across the full working load range.The floating sheave and bearing system is supported by a fibre-reinforced load frame. The design was computer modelled to be stress optimised. The Dyneema® Link is produced from FSE Robline SK75 fibre, which is 10 times stronger and lighter than steel, and provides the final connection from the block to the load point. Our Part # RONRF55151 | Ronstan Part # RF55151\u003c\/p\u003e\u003cp\u003eKilogram for kilogram of working load, BB and RT Orbit Block™ are the world's lightest. The unique orbital design allows the bearing to only be in the active areas of the floating sheave. This minimises the mass of the inactive return race and hub.Weight: and bulk are further reduced in the different block configurations. The ball bearing single and becket block has a through-sheave becket arrangement. The result? The lowest Weight: possible.Multi-sheave blocks have only single intermediate cheeks and an ultra-light and efficient head arrangement. This gives a 30% Weight: saving advantage over the nearest competitor. Other brands just link together their single blocks. This results in unnecessary double cheeks between each sheave, held together by a heavy steel channel across the top of the block.\u003c\/p\u003e\u003cp\u003eHighest working load in its class:The orbital ball-bearing arrangement gives the largest possible bearing race diameter. This maximises load performance. The proven Ronstan 2-stage bearing system features high compression grade acetal ball bearings and a secondary full-contact bearing. This gives minimum friction across the full working load range.The floating sheave and bearing system is supported by a fibre-reinforced load frame. The design was computer modelled to be stress optimised. The Dyneema® Link is produced from FSE Robline SK75 fibre, which is 10 times stronger and lighter than steel, and provides the final connection from the block to the load point.\u003c\/p\u003e\u003cp\u003eThe orbital ball-bearing arrangement gives the largest possible bearing race diameter. This maximises load performance. The proven Ronstan 2-stage bearing system features high compression grade acetal ball bearings and a secondary full-contact bearing. This gives minimum friction across the full working load range.\u003c\/p\u003e\u003cp\u003eThe floating sheave and bearing system is supported by a fibre-reinforced load frame. The design was computer modelled to be stress optimised. The Dyneema® Link is produced from FSE Robline SK75 fibre, which is 10 times stronger and lighter than steel, and provides the final connection from the block to the load point.\u003c\/p\u003e\u003cp\u003eOur Part # RONRF55151 | Ronstan Part # RF55151\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49347965321522,"sku":"RONRF55151","price":56.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF55151.jpg?v=1735835696"},{"product_id":"ronrf56510","title":"Ronstan Series 55 RT Orbit Block, Fiddle Becket Swivel (RF56510)","description":"\u003cp\u003eAutomatic ratchet block:Now you can enjoy the flexibility of setting up your ratchet blocks to suit yourself. Ronstan is the only company that offers a ratchet block with both auto and manual engagement modes*. In the auto mode of the ratchet mechanism engages when load is applied, but switches off when it's released. This lets the sheet run out smoothly and freely-great for rapid easing of the sheet and for gybing asymmetric spinnakers. In manual mode, the ratchet mechanism can be switched on or off as required. This is the preferred mainsheet set-up for may top sailors. Try the block in both modes and see which you prefer - you really can't go wrong.Awesome ratchet block holding power:Quite simply, Ronstan Ratchet Orbit Blocks™ have the highest holding power available. The sophisticated NC-machined sheave features Generation 2 of our patented sheave cross-hole geometry. Its holding power is up to 21:1, almost double that of our nearest competitior. The unique sheave design has 12 gripping faces which directly resist loaded line movement. Traditional designes have only 8 faces with an angled resistance to line movement. Our Generation 2 design has straight resistance faces which both distribute the load and minimise rope wear. These faces are offset from the radial line, to draw the rope down into the gripping area when under load. Our Part # RONRF56510 | Ronstan Part # RF56510\u003c\/p\u003e\u003cp\u003eNow you can enjoy the flexibility of setting up your ratchet blocks to suit yourself. Ronstan is the only company that offers a ratchet block with both auto and manual engagement modes*. In the auto mode of the ratchet mechanism engages when load is applied, but switches off when it's released. This lets the sheet run out smoothly and freely-great for rapid easing of the sheet and for gybing asymmetric spinnakers. In manual mode, the ratchet mechanism can be switched on or off as required. This is the preferred mainsheet set-up for may top sailors. Try the block in both modes and see which you prefer - you really can't go wrong.\u003c\/p\u003e\u003cp\u003eAwesome ratchet block holding power:Quite simply, Ronstan Ratchet Orbit Blocks™ have the highest holding power available. The sophisticated NC-machined sheave features Generation 2 of our patented sheave cross-hole geometry. Its holding power is up to 21:1, almost double that of our nearest competitior. The unique sheave design has 12 gripping faces which directly resist loaded line movement. Traditional designes have only 8 faces with an angled resistance to line movement. Our Generation 2 design has straight resistance faces which both distribute the load and minimise rope wear. These faces are offset from the radial line, to draw the rope down into the gripping area when under load.\u003c\/p\u003e\u003cp\u003eQuite simply, Ronstan Ratchet Orbit Blocks™ have the highest holding power available. The sophisticated NC-machined sheave features Generation 2 of our patented sheave cross-hole geometry. Its holding power is up to 21:1, almost double that of our nearest competitior. The unique sheave design has 12 gripping faces which directly resist loaded line movement. Traditional designes have only 8 faces with an angled resistance to line movement. Our Generation 2 design has straight resistance faces which both distribute the load and minimise rope wear. These faces are offset from the radial line, to draw the rope down into the gripping area when under load.\u003c\/p\u003e\u003cp\u003eOur Part # RONRF56510 | Ronstan Part # RF56510\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49347968500018,"sku":"RONRF56510","price":99.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF56510.jpg?v=1735835641"},{"product_id":"ronrf45130","title":"Ronstan Series 40 BB Orbit Block, Single, Becket, Cleat, Swivel Head (RF45130)","description":"\u003cp\u003eBall Bearing Orbit Blocks'boast the highest strength-to-weight ratio available. This is achieved through all-composite reinforced polymer materials and multiple attachment options. Their precision design provides the optimum number of ball bearings for minimum friction while weight reduction is achieved through the use of fibre-reinforced composites in the block head, cleat arms and beckets.\u003c\/p\u003e\u003cp\u003eMainsheet systems on spinnaker sheet on dinghies to 5 m (16 ft), spinnaker sheets on dinghies, sportsboats and small keel boats to 5 m (16 ft), halyard, vang and backstay applications on boats to 8 m (26 ft), control line applications on larger yachts. Our Part # RONRF45130 | Ronstan Part # RF45130\u003c\/p\u003e\u003cp\u003eMainsheet systems on spinnaker sheet on dinghies to 5 m (16 ft), spinnaker sheets on dinghies, sportsboats and small keel boats to 5 m (16 ft), halyard, vang and backstay applications on boats to 8 m (26 ft), control line applications on larger yachts.\u003c\/p\u003e\u003cp\u003eOur Part # RONRF45130 | Ronstan Part # RF45130\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49347978232114,"sku":"RONRF45130","price":101.17,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF45130.jpg?v=1735835536"},{"product_id":"ronrf48200","title":"Ronstan S40 BB Orbit Block,Double,Swivel Shackle (RF48200)","description":"\u003cp\u003eThe new Series 40 ball bearing Orbit Blocks provide the perfect balance of strength, performance, and reliability. They offer class-leading dynamic and static load ratings, the highest available in this size of performance blocks. Lightweight and strong toughened glass fibre reinforced nylon cheeks replace stainless steel straps used in traditional utility blocks - the perfect balance of performance and reliability. As well as traditional single swivel blocks, the range also includes single and double sheave lashing or soft attachment options through to multiple sheave blocks including those with quad and quin sheaves. The range is extremely versatile allowing a multitude of possible systems right up to a 12:1 purchase mainsheet system for off-the-beach performance catamarans.\u003c\/p\u003e\u003cp\u003eBall Bearing versions incorporate our 2-stage bearing system using ball bearings to minimise friction and a secondary full-contact bearing to maintain low friction across the full working load range.\u003c\/p\u003e\u003cp\u003eOur Part # RONRF48200| Ronstan Part # RF48200\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49348011393330,"sku":"RONRF48200","price":90.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF48200.jpg?v=1728028835"},{"product_id":"ron-rf35109hl","title":"Ronstan Series 30 Orbit Block Hhl, Single \u0026 Becket, Fixed Head (RF35109HL)","description":"\u003cp\u003eBall Bearing Orbit Blocks boast the highest strength-to-weight ratio available. This is achieved through all-composite reinforced polymer materials and multiple attachment options.\u003c\/p\u003e\u003cp\u003eTheir precision design provides the optimum number of ball bearings for minimum friction while weight reduction is achieved through the use of fibre-reinforced composites in the block head, cleat arms and beckets.\u003c\/p\u003e\u003cp\u003eOur Part # RON-RF35109HL | Ronstan Part # RF35109HL\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49348027908402,"sku":"RON-RF35109HL","price":109.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RON-RF35109HL.jpg?v=1728018546"},{"product_id":"ronrf48210","title":"Ronstan S40 BB Orbit Block,Double,Becket,Swivel Shackle (RF48210)","description":"\u003cp\u003eThe Ronstan S40 BB Orbit Block, Double, Becket, Swivel Shackle #RF40530 is a versatile sailing essential designed for strength and performance on the water. With its innovative two-stage ball bearing system, it offers smooth operation while maintaining low friction, making it perfect for sailing enthusiasts. Crafted with precision, this block is a reliable addition to any sailing gear.\u003c\/p\u003e\u003cp\u003eThe block features high compression strength acetal sheave and balls, ensuring durability and performance. The frame and cheeks are made of toughened, glass fibre reinforced nylon, providing robust strength without the weight of traditional stainless steel. Head fittings and hubs crafted from grade 316 stainless steel add to its reliability and corrosion resistance, making it ideal for various sailing applications.\u003c\/p\u003e\u003cp\u003eUsage\u003c\/p\u003e\u003cp\u003eThis block is perfect for creating multiple sheave systems, with versatility allowing setups such as a 12:1 purchase mainsheet system, suitable for performance catamarans and other off-the-beach sailing vessels.\u003c\/p\u003e\u003cp\u003eOur Part #RONRF48210 | Mfr. Part #RF48210\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49348043374898,"sku":"RONRF48210","price":100.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF48210.jpg?v=1728051600"},{"product_id":"ronrf55210","title":"Ronstan Series 55 BB Orbit Block, Double Becket Swivel (RF55210)","description":"\u003cp\u003eSheaves running on Acetal or Torlon ball bearings provide high performance \u0026amp; low friction. The 2-stage ball bearing system provides consistent performance over the full load range. Swivel shackle head for full 360 degree rotation (non-locking).\u003c\/p\u003e\u003cp\u003eOur Part # RONRF55210| Ronstan Part # RF55210\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49348070572338,"sku":"RONRF55210","price":106.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF55210.jpg?v=1735835702"},{"product_id":"ronrf48300","title":"Ronstan S40 BB Orbit Block,Triple,Swivel Shackle (RF48300)","description":"\u003cp\u003eThe Ronstan S40 BB Orbit Block, Triple, Swivel Shackle #RF40530 is a top choice for sailors looking for a balance of strength and reliability in their sailing gear. With its innovative ball bearing system and toughened materials, it's designed to handle high loads while minimizing friction. It's like having a dependable helping hand on your sailing adventures.\u003c\/p\u003e   \u003cp\u003eCrafted with high compression strength acetal sheaves and balls, this block is built to last. The frame and cheeks are made from toughened, glass fibre reinforced nylon, providing resilience without the extra weight. Featuring grade 316 stainless steel head fittings and hubs, it ensures robust performance in marine environments. Perfect for a 12:1 purchase mainsheet system, it's compatible with off-the-beach performance catamarans and more.\u003c\/p\u003e  \u003cp\u003eUsage\u003c\/p\u003e \u003cp\u003eIdeal for sailors who need a reliable and efficient block system for high-performance sailing. Whether you're racing or cruising, this block offers the versatility and strength required for demanding sailing conditions.\u003c\/p\u003e\u003cp\u003eOur Part #RONRF48300 | Mfr. Part #RF48300\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49348074930482,"sku":"RONRF48300","price":134.46,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF48300.jpg?v=1728057540"},{"product_id":"ronrf55310","title":"Ronstan Series 55 BB Orbit Block, Triple Becket Swivel (RF55310)","description":"\u003cp\u003eThe Ronstan Series 55 BB Orbit Block, Triple Becket Swivel #RF55310 is your go-to choice for lightweight and high-performance sailing. It's designed with an innovative orbital ball-bearing system that ensures maximum load capacity, making it perfect for competitive sailors. This triple block setup is crafted for optimal efficiency without unnecessary bulk.\u003c\/p\u003e   \u003cp\u003eConstructed with toughened, glass fibre reinforced Nylon, the block's sheaves are made from carbon fibre reinforced PTFE impregnated Nylon. The robust head fitting is made of Grade 316 stainless steel, ensuring longevity even in challenging conditions. With its high-performance materials, this block is ideal for mainsheet systems on dinghies, sportsboats, and small keelboats up to 9m (30ft), as well as various control line applications on larger yachts.\u003c\/p\u003e  \u003cp\u003eUsage\u003c\/p\u003e \u003cp\u003ePerfect for mainsheet and spinnaker sheet systems, as well as halyard, vang, and backstay applications on boats up to 8m (26ft). This versatile block is also excellent for control line applications on larger yachts, providing reliable performance across a range of sailing scenarios.\u003c\/p\u003e\u003cp\u003eOur Part #RONRF55310 | Mfr. Part #RF55310\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49348079354162,"sku":"RONRF55310","price":136.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF55310.jpg?v=1735835399"},{"product_id":"ronrf48310","title":"Ronstan S40 BB Orbit Block,Triple,Becket,Swivel Shackle (RF48310)","description":"\u003cp\u003eThe Ronstan S40 BB Orbit Block, Triple, Becket, Swivel Shackle #RF40530 is a real powerhouse for sailing enthusiasts, offering a perfect blend of strength and versatility. It's designed with advanced materials to withstand dynamic and static loads, ensuring optimal performance on the water. This strong block is a reliable companion for those seeking top-notch sailing gear without compromise.\u003c\/p\u003e   \u003cp\u003eThis product uses high compression strength acetal for the sheave and balls, ensuring durability and excellent performance under load. Its frame is crafted from toughened, glass fibre reinforced nylon, offering a lightweight yet robust structure. The head fittings and hubs are made from grade 316 stainless steel, providing excellent corrosion resistance—a crucial feature for marine environments. The strong block is compatible with a variety of sailing setups, including those requiring complex systems up to a 12:1 purchase mainsheet system for performance catamarans.\u003c\/p\u003e  \u003cp\u003eUsage\u003c\/p\u003e \u003cp\u003ePerfect for off-the-beach performance catamarans or any sailing setup requiring high-performance blocks, ensuring smooth sailing with minimal friction.\u003c\/p\u003e\u003cp\u003eOur Part #RONRF48310 | Mfr. Part #RF48310\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49348110221618,"sku":"RONRF48310","price":143.46,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF48310.jpg?v=1728041588"},{"product_id":"ronrf48120","title":"Ronstan S40 BB Orbit Block,Single,Cleat,Swivel (RF48120)","description":"\u003cp\u003eThe new Series 40 ball bearing Orbit Blocks provide the perfect balance of strength, performance, and reliability. They offer class-leading dynamic and static load ratings, the highest available in this size of performance blocks. Lightweight and strong toughened glass fibre reinforced nylon cheeks replace stainless steel straps used in traditional utility blocks - the perfect balance of performance and reliability. As well as traditional single swivel blocks, the range also includes single and double sheave lashing or soft attachment options through to multiple sheave blocks including those with quad and quin sheaves. The range is extremely versatile allowing a multitude of possible systems right up to a 12:1 purchase mainsheet system for off-the-beach performance catamarans. Ball Bearing versions incorporate our 2-stage bearing system using ball bearings to minimise friction and a secondary full-contact bearing to maintain low friction across the full working load range.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eMaterials:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSheave and Ball Bearings: High compression strength acetal\u003c\/li\u003e\n\u003cli\u003eFrame\/cheeks: Toughened, glass fibre reinforced nylon\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49348238573874,"sku":"RONRF48120","price":145.61,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF48120.jpg?v=1728038964"},{"product_id":"ronrf48109hl","title":"Ronstan S40 BB Orbit Block,HHL,Single,Becket Option,Lashing (RF48109HL)","description":"\u003cp\u003eThe new Series 40 ball bearing Orbit Blocks provide the perfect balance of strength, performance, and reliability. They offer class-leading dynamic and static load ratings, the highest available in this size of performance blocks. Lightweight and strong toughened glass fibre reinforced nylon cheeks replace stainless steel straps used in traditional utility blocks - the perfect balance of performance and reliability. As well as traditional single swivel blocks, the range also includes single and double sheave lashing or soft attachment options through to multiple sheave blocks including those with quad and quin sheaves. The range is extremely versatile allowing a multitude of possible systems right up to a 12:1 purchase mainsheet system for off-the-beach performance catamarans. High Load versions are designed specifically for any application where high dynamic or static loads are expected. They feature a high strength grade 2205 stainless steel sheave \u0026amp; hub together with a triple bearing race to maintain low friction at very high loads.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eMaterials:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHHL sheave and bearing race: Grade 2205 stainless steel, ball bearings: Grade 304 stainless steel\u003c\/li\u003e\n\u003cli\u003eFrame\/cheeks: Toughened, glass fibre reinforced nylon\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49348286972210,"sku":"RONRF48109HL","price":175.62,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF48109HL.jpg?v=1728032059"},{"product_id":"ronrf48400","title":"Ronstan S40 BB Orbit Block,Quad,Swivel Shackle (RF48400)","description":"\u003cp\u003eThe new Series 40 ball bearing Orbit Blocks provide the perfect balance of strength, performance, and reliability. They offer class-leading dynamic and static load ratings, the highest available in this size of performance blocks. Lightweight and strong toughened glass fibre reinforced nylon cheeks replace stainless steel straps used in traditional utility blocks - the perfect balance of performance and reliability. As well as traditional single swivel blocks, the range also includes single and double sheave lashing or soft attachment options through to multiple sheave blocks including those with quad and quin sheaves. The range is extremely versatile allowing a multitude of possible systems right up to a 12:1 purchase mainsheet system for off-the-beach performance catamarans.\u003c\/p\u003e\u003cp\u003eBall Bearing versions incorporate our 2-stage bearing system using ball bearings to minimise friction and a secondary full-contact bearing to maintain low friction across the full working load range.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eMaterials:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBB Sheave and balls: High compression strength acetal\u003c\/li\u003e\n\u003cli\u003eFrame\/cheeks: Toughened, glass fibre reinforced nylon\u003c\/li\u003e\n\u003cli\u003eHead fittings and hubs: Grade 316 stainless steel\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49348306665778,"sku":"RONRF48400","price":180.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF48400.jpg?v=1728053412"},{"product_id":"ronrf48410","title":"Ronstan S40 BB Orbit Block,Quad,Becket,Swivel Shackle (RF48410)","description":"\u003cp\u003eThe new Series 40 ball bearing Orbit Blocks provide the perfect balance of strength, performance, and reliability. They offer class-leading dynamic and static load ratings, the highest available in this size of performance blocks. Lightweight and strong toughened glass fibre reinforced nylon cheeks replace stainless steel straps used in traditional utility blocks - the perfect balance of performance and reliability. As well as traditional single swivel blocks, the range also includes single and double sheave lashing or soft attachment options through to multiple sheave blocks including those with quad and quin sheaves. The range is extremely versatile allowing a multitude of possible systems right up to a 12:1 purchase mainsheet system for off-the-beach performance catamarans.\u003c\/p\u003e\u003cp\u003eBall Bearing versions incorporate our 2-stage bearing system using ball bearings to minimise friction and a secondary full-contact bearing to maintain low friction across the full working load range.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eMaterials:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBB Sheave and balls: High compression strength acetal\u003c\/li\u003e\n\u003cli\u003eFrame\/cheeks: Toughened, glass fibre reinforced nylon\u003c\/li\u003e\n\u003cli\u003eHead fittings and hubs: Grade 316 stainless steel\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49348350640434,"sku":"RONRF48410","price":189.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF48410.jpg?v=1728029825"},{"product_id":"ronrf55410","title":"Ronstan Series 55 BB Orbit Block, Quad Becket Swivel (RF55410)","description":"\u003cp\u003e\u003cb\u003eLight Weight:\u003c\/b\u003e\u003cbr\u003e\n Kilogram for kilogram of working load, BB and RT Orbit Block™ are the world's lightest. The unique orbital design allows the bearing to only be in the active areas of the floating sheave. This minimises the mass of the inactive return race and hub.\n Weight: and bulk are further reduced in the different block configurations. The ball bearing single and becket block has a through-sheave becket arrangement. The result? The lowest Weight: possible.\n Multi-sheave blocks have only single intermediate cheeks and an ultra-light and efficient head arrangement. This gives a 30% Weight: saving advantage over the nearest competitor. Other brands just link together their single blocks. This results in unnecessary double cheeks between each sheave, held together by a heavy steel channel across the top of the block.\u003c\/p\u003e\n \u003cp\u003e\u003cb\u003eHighest working load in its class:\u003c\/b\u003e\u003cbr\u003e\n The orbital ball-bearing arrangement gives the largest possible bearing race diameter. This maximises load performance. The proven Ronstan 2-stage bearing system features high compression grade acetal ball bearings and a secondary full-contact bearing. This gives minimum friction across the full working load range.\u003c\/p\u003e\n \u003cp\u003eThe floating sheave and bearing system is supported by a fibre-reinforced load frame. The design was computer modelled to be stress optimised. The Dyneema® Link is produced from FSE Robline SK75 fibre, which is 10 times stronger and lighter than steel, and provides the final connection from the block to the load point.\u003c\/p\u003e\n \u003cp\u003e\u003cb\u003eApplications:\u003c\/b\u003e\u003c\/p\u003e\n \u003cul\u003e \n \u003cli\u003eMainsheet systems on dinghies, sportsboats and small keelboats to 9m (30ft).\u003c\/li\u003e\n \u003cli\u003eHalyard, Vang and Backstay application on boats to 8m (26ft).\u003c\/li\u003e\n \u003cli\u003eControl line applications on larger yachts.\u003c\/li\u003e\n \u003cli\u003eIdeal use for mainsheet systems and spinnaker sheets on dinghies, sportsboats and small keel.\u003c\/li\u003e\n \u003cli\u003eboats to 9m (30ft).\u003c\/li\u003e\n \u003cli\u003eAlso ideal with halyard, vang and backstay applications on boats to 8m (26ft).\u003c\/li\u003e\n \u003cli\u003eSpinnaker sheets on sportsboats and small keel boats (lateral lead blocks)\u003c\/li\u003e\n \u003cli\u003eControl line applications on larger yachts.\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003cp\u003e\u003cb\u003eMaterials:\u003c\/b\u003e\u003c\/p\u003e\n \u003cul\u003e \n \u003cli\u003eBall bearings - High compression strength carbon black Acetal.\u003c\/li\u003e\n \u003cli\u003eStage 2 bearing - Carbon fibre reinforced, PTFE impregnated Nylon.\u003c\/li\u003e\n \u003cli\u003eFrame\/Cheeks - Toughened, glass fibre reinforced Nylon.\u003c\/li\u003e\n \u003cli\u003eRope Link: UV stabilised, multi-strand impregmented SK75 Dyneema®.\u003c\/li\u003e\n \u003cli\u003eSheave: Carbon fibre reinforced, PTFE impregnated Nylon.\u003c\/li\u003e\n \u003cli\u003eHead fitting: Grade 316 stainless steel.\u003c\/li\u003e\n \u003cli\u003eBall Bearings: High compression strength carbon black Acetal.\u003c\/li\u003e\n \u003cli\u003eStage 2 Bearing: Glass fibre reinforced, MoS2 impregnated Nylon.\u003c\/li\u003e\n \u003c\/ul\u003e\u003cp\u003e Our Part # RONRF55410 | Mfr. Part # RF55410\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49348398448946,"sku":"RONRF55410","price":204.77,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF55410.jpg?v=1735835558"},{"product_id":"ronrf48500","title":"Ronstan S40 BB Orbit Block,Quin,Swivel Shackle (RF48500)","description":"\u003cp\u003eThe new Series 40 ball bearing Orbit Blocks provide the perfect balance of strength, performance, and reliability. They offer class-leading dynamic and static load ratings, the highest available in this size of performance blocks. Lightweight and strong toughened glass fibre reinforced nylon cheeks replace stainless steel straps used in traditional utility blocks - the perfect balance of performance and reliability. As well as traditional single swivel blocks, the range also includes single and double sheave lashing or soft attachment options through to multiple sheave blocks including those with quad and quin sheaves. The range is extremely versatile allowing a multitude of possible systems right up to a 12:1 purchase mainsheet system for off-the-beach performance catamarans.\u003c\/p\u003e\u003cp\u003eBall Bearing versions incorporate our 2-stage bearing system using ball bearings to minimise friction and a secondary full-contact bearing to maintain low friction across the full working load range.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eMaterials:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n \u003cli\u003eBB Sheave and balls: High compression strength acetal\u003c\/li\u003e\n \u003cli\u003eFrame\/cheeks: Toughened, glass fibre reinforced nylon\u003c\/li\u003e\n \u003cli\u003eHead fittings and hubs: Grade 316 stainless steel\u003c\/li\u003e\n \u003c\/ul\u003e \u003cp\u003e Our Part # RONRF48500 | Mfr. Part # RF48500 \u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49348401463602,"sku":"RONRF48500","price":205.73,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF48500.jpg?v=1728020896"},{"product_id":"ronrf56130","title":"Ronstan Series 55 RT Orbit Block, Single Becket Cleat Swivel (RF56130)","description":"\u003cp\u003e\u003cb\u003eAutomatic ratchet block:\u003c\/b\u003e\u003cbr\u003e\n Now you can enjoy the flexibility of setting up your ratchet blocks to suit yourself. Ronstan is the only company that offers a ratchet block with both auto and manual engagement modes*. In the auto mode of the ratchet mechanism engages when load is applied, but switches off when it's released. This lets the sheet run out smoothly and freely-great for rapid easing of the sheet and for gybing asymmetric spinnakers. In manual mode, the ratchet mechanism can be switched on or off as required. This is the preferred mainsheet set-up for may top sailors. Try the block in both modes and see which you prefer - you really can't go wrong.\u003c\/p\u003e\n \u003cp\u003e\u003cb\u003eAwesome ratchet block holding power:\u003c\/b\u003e\u003cbr\u003e\n Quite simply, Ronstan Ratchet Orbit Blocks™ have the highest holding power available. The sophisticated NC-machined sheave features Generation 2 of our patented sheave cross-hole geometry. Its holding power is up to 21:1, almost double that of our nearest competitior. The unique sheave design has 12 gripping faces which directly resist loaded line movement. Traditional designes have only 8 faces with an angled resistance to line movement. Our Generation 2 design has straight resistance faces which both distribute the load and minimise rope wear. These faces are offset from the radial line, to draw the rope down into the gripping area when under load.\u003c\/p\u003e\n \n \u003cp\u003e\u003cb\u003eMaterials:\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\n \u003cul\u003e \u003cli\u003eSheave: Anodised Aluminium\u003c\/li\u003e\n \u003cli\u003eBall Bearings: High compression strength carbon black Aceetal\u003c\/li\u003e\n \u003cli\u003eFrame\/Cheeks: Toughened, glass fibre reinforced Nylon\u003c\/li\u003e\n \u003cli\u003eRope Link: UV stabilised, multi-strand impregnated SK75 Dyneema®\u003c\/li\u003e\n \u003c\/ul\u003e\u003cp\u003e Our Part # RONRF56130 | Mfr. Part # RF56130\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":49348496916786,"sku":"RONRF56130","price":177.22,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF56130.jpg?v=1735835477"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/collections\/RONRF56151A.jpg?v=1763171047","url":"https:\/\/www.mauripro.com\/collections\/ronstan-orbit-blocks.oembed?page=5","provider":"MAURIPRO","version":"1.0","type":"link"}