{"title":"Ronstan Series 20 BB Orbit Block Lashing Head — User Instructions","description":"\u003clink rel=\"stylesheet\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/om-manual-v2.css\"\u003e\u003cstyle\u003e.mpom .om-tbl.nw td+td{white-space:nowrap}.mpom details.om-dd{position:relative;margin:0}.mpom details.om-dd\u003esummary{list-style:none;cursor:pointer}.mpom details.om-dd\u003esummary::-webkit-details-marker{display:none}.mpom .om-dd-menu{position:absolute;left:0;top:calc(100% + 6px);min-width:100%;width:max-content;max-width:360px;background:#fff;border:1px solid #e3e5e8;border-radius:6px;box-shadow:0 8px 24px rgba(0,0,0,.14);z-index:30;padding:6px}.mpom .om-dd-menu a{display:flex;justify-content:space-between;align-items:center;gap:14px;padding:10px 12px;border-radius:4px;font-size:14px;font-weight:600;color:#2a2b2a!important;text-decoration:none!important}.mpom .om-dd-menu a:hover{background:#f5f6f8}.mpom .om-dd-menu small{font-weight:400;color:#5f6368;white-space:nowrap}\u003c\/style\u003e\u003cdiv class=\"mpom\"\u003e\n\u003cdiv class=\"om-head\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"om-tag\"\u003eINSTRUCTIONS\u003c\/span\u003e\u003cp class=\"om-lead\"\u003eStep-by-step lashing and becket options for the Ronstan RF25109HL Series 20 BB Orbit Block™ lashing head, plus lashing inspection and bearing care.\u003c\/p\u003e\n\u003cdiv class=\"om-box\"\u003e\n\u003cdiv class=\"om-row\"\u003e\n\u003cspan\u003eDocument\u003c\/span\u003e\u003cb\u003eRonstan Series 20 BB Orbit Block Lashing Head User Instructions\u003c\/b\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"om-row\"\u003e\n\u003cspan\u003eFormat\u003c\/span\u003e\u003cb\u003ePDF · 4 pages · 1.2 MB\u003c\/b\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"om-row\" style=\"border-bottom:0\"\u003e\n\u003cspan\u003eLanguage\u003c\/span\u003e\u003cb\u003eEnglish\u003c\/b\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"om-acts\"\u003e\n\u003ca class=\"om-btn dl\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/Ronstan-RF25109HL-Series-20-Orbit-Block-Lashing-Head-Instructions.pdf\" target=\"_blank\" rel=\"noopener\"\u003e\u003csvg viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.4\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\u003e\u003cpath d=\"M12 4v11\"\u003e\u003c\/path\u003e\u003cpath d=\"m7 10 5 5 5-5\"\u003e\u003c\/path\u003e\u003cpath d=\"M5 20h14\"\u003e\u003c\/path\u003e\u003c\/svg\u003e Download PDF\u003c\/a\u003e\u003ca class=\"om-btn buy\" href=\"\/products\/ronrf25109\"\u003eBuy\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"om-toc\"\u003e\n\u003ca href=\"#om-key\"\u003eKey Points\u003c\/a\u003e\u003ca href=\"#om-lash\"\u003eLashing Options\u003c\/a\u003e\u003ca href=\"#om-becket\"\u003eBecket Options\u003c\/a\u003e\u003ca href=\"#om-care\"\u003eCare\u003c\/a\u003e\u003ca href=\"#om-products\"\u003eProducts\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"om-img\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/RONRF25109.jpg?v=1735835535\" alt=\"Ronstan Series 20 BB Orbit Block Lashing Head — User Instructions\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"om-block\" id=\"om-key\"\u003e\n\u003ch2 class=\"om-h\"\u003eBefore You Lash\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eTo meet the breaking loads the block must be lashed with the lashing, strop or link passing through the hub.\u003c\/li\u003e\n\u003cli\u003eLashing path: down through the head, out through the cheek, through the hub, back in through the opposite cheek and up out of the head. Repeat for line sizes that need more than one strand to meet the load rating.\u003c\/li\u003e\n\u003cli\u003eThe MWL and BL of the assembly (block + lashing) are generally limited by the rope and the joining method; knots, splices and stitching are generally weaker than the rope itself.\u003c\/li\u003e\n\u003cli\u003eUp to 4mm (5\/32\") line can be used as a single strand, but a neater, more secure result comes from smaller line (e.g. 1.7 - 2mm) passed several times. The block is supplied with 750mm (30\") of 2mm (3\/32\") single braid Dyneema® lashing line.\u003c\/li\u003e\n\u003cli\u003eAttach to a smooth, well rounded mounting point. On sharp-edged or rough fittings put a smooth shackle between lashing and fitting. Inspect the lashing regularly and replace it immediately if damaged.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"om-block om-grid2\" id=\"om-lash\"\u003e\n\u003cdiv\u003e\n\u003ch2 class=\"om-h\"\u003eAttachment at 0° (In-line)\u003c\/h2\u003e\n\u003col\u003e\n\u003cli\u003ePass the line down through the head and out through the cheek.\u003c\/li\u003e\n\u003cli\u003ePass it in through the opposite cheek and back up through the head.\u003c\/li\u003e\n\u003cli\u003ePass it around the fixing point; repeat if more than one strand is needed for the breaking load.\u003c\/li\u003e\n\u003cli\u003eFinish with an appropriate knot, splice or whipping.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch2 class=\"om-h\"\u003eAttachment at 90°\u003c\/h2\u003e\n\u003col\u003e\n\u003cli\u003eDown through the head, out through the cheek and through the hub.\u003c\/li\u003e\n\u003cli\u003eIn through the opposite cheek and back up through the head.\u003c\/li\u003e\n\u003cli\u003eLoop over the fixing point, back down through the head and out the same cheek it last passed through.\u003c\/li\u003e\n\u003cli\u003eThrough the hub, in through the opposite cheek and up through the head; repeat if more than one strand is required.\u003c\/li\u003e\n\u003cli\u003eFinish with an appropriate knot, splice or whipping.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch2 class=\"om-h\"\u003eEnd Attachment\u003c\/h2\u003e\n\u003col\u003e\n\u003cli\u003eDown through the head and out through the cheek.\u003c\/li\u003e\n\u003cli\u003eThrough the hub.\u003c\/li\u003e\n\u003cli\u003eIn through the opposite cheek and back up through the head.\u003c\/li\u003e\n\u003cli\u003eTie a bowline above the block – the knot must be non-slipping (non-tightening) – or, for the cleanest finish, use an eye splice.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch2 class=\"om-h\"\u003eLarge Diameter Object (e.g. a boom)\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eWhere the object is wider than the head of the block, the lashings must cross each other between the head and the object.\u003c\/li\u003e\n\u003cli\u003eFour strands are required to stop the block twisting and giving a poor lead.\u003c\/li\u003e\n\u003cli\u003eStrands from one side go to the outside; strands from the other side pass between them.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"om-block\" id=\"om-becket\"\u003e\n\u003ch2 class=\"om-h\"\u003eBecket Options\u003c\/h2\u003e\n\u003cdiv class=\"om-tbl nw\"\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eOption\u003c\/th\u003e\n\u003cth\u003eSheet size\u003c\/th\u003e\n\u003cth\u003eHow\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThrough-hub becket\u003c\/td\u003e\n\u003ctd\u003eUp to 3mm (1\/8\")\u003c\/td\u003e\n\u003ctd\u003eAttach the block as in the lashing options; the hub is the becket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLashing used as becket\u003c\/td\u003e\n\u003ctd\u003e4mm (5\/32\") to 6mm (1\/4\")\u003c\/td\u003e\n\u003ctd\u003eDown through the head, out the cheek and through the hub; loop under the bottom of the block and again through the hub (repeat for more loops if needed for the breaking load); in through the far cheek and up through the head. Finish, then attach the sheet to the becket loops with a bowline or splice.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSingle line as becket \u0026amp; sheet\u003c\/td\u003e\n\u003ctd\u003eUp to 3mm (1\/8\")\u003c\/td\u003e\n\u003ctd\u003eIn through a cheek, up through the head, around the fixing point, back down through the head and out the opposite cheek; pass both ends through the hub in opposite directions and finish.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003cp class=\"om-note\"\u003eFor the single-line option the knot must not be a slip knot and must pull equally on each line leading to the hub – a bowline is ideal. The breaking load of the installed block depends on the breaking load of the line, up to a maximum B.L. of 900kg (1980lb).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"om-block\" id=\"om-care\"\u003e\n\u003ch2 class=\"om-h\"\u003eCare and Maintenance\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eInstall lashings correctly, inspect them regularly and replace them when required. Lashings degrade from fatigue, wear and UV: inspect them with the rest of your rigging and replace them if they show significant wear or fibre damage.\u003c\/li\u003e\n\u003cli\u003eGrit and sand damage the bearings: flush the blocks, especially the bearing areas, with fresh water regularly and clean them periodically with mild detergent and water.\u003c\/li\u003e\n\u003cli\u003eDry lubricants such as Ronstan Sailfast™ silicon spray may be used on the bearings. Never use oil\/petrochemical based lubricants.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"om-note\"\u003eBB = Ball Bearing. MWL = Maximum Working Load. BL = Breaking Load.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp class=\"om-note\"\u003eNeed a part that isn't listed? \u003ca href=\"\/pages\/contact\"\u003eAsk us to source it\u003c\/a\u003e and quote the part number from the PDF.\u003c\/p\u003e\n\u003ch2 class=\"om-h\" id=\"om-products\"\u003eProducts in this Manual\u003c\/h2\u003e\n\u003c\/div\u003e","products":[{"product_id":"ronrf25109","title":"Ronstan Series 20 BB Orbit Block, Single, Lashing, Becket","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"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/collections\/RONRF25109.jpg?v=1792712456","url":"https:\/\/www.mauripro.com\/collections\/owners-manuals-ronstan-series-20-orbit-block-lashing-head.oembed","provider":"MAURIPRO Sailing","version":"1.0","type":"link"}