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Ronstan Series 55 BB Orbit Block, Cheek (RF55151)

SKU: RONRF55151  |  Manuf. Code: RF55151
List Price:  65.00 USD
$55.34 USD
You Save $10 This Week!

Description

Light 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

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.

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

Features

  • Ultra Light Weight.
  • Low friction 2-stage Orbital ball bearing system.
  • Highest working load in its class.
  • Low profile and compact.
  • High performance cleating.
  • Swivel shackle head for unlimited block rotation.
  • Stainless steel shackle head and compatibility with sharp fixing points.
  • Ultra low profile integrated becket.

Technical Information


DescriptionImperialMetric
Sheave Ø2 1/6 in.55.00 mm.
Maximum Rope 2/5 in.10.00 mm.
Maximum Working Load1102.50 lb.500.00 kg.
Breaking Load2205.00 lb.1000.00 kg.
Weight2.47 oz.70.00 gr.