Ronstan

    Ronstan Series 40 Ball Bearing Orbit Block - Single - Becket - Swivel Head

    Product Code CWR-55218
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    Series 40 Ball Bearing Orbit Block™ - Single - Becket - Swivel HeadCore Blocks™ are a true all round solution. A tuned 2-stage bearing system provides excellent performance across the full working load range with an integrated thrust bearing feature and the resilience to handle high dynamic or static loads. Acetal sheave, alloy cheeks and stainless fixings complete the durable package. For reliability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing.LightweightKilogram for kilogram of working load, BB 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.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 ClassThe 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 fiber-reinforced load frame. The design was computer modelled to be stress optimised.Features:Ultra LightweightLow friction 2-stage Orbital ball bearing systemHighest working load in its classLow profile and compactHigh performance cleatingSwivel shackle head for unlimited block rotationStainless steel shackle head for ultimate durability and compatibility with harsh fixing pointsUltra low profile integrated becketApplications:Spinnaker sheets on dinghies, sportsboats and small keel boats to 5M(16')Halyard, vang and backstay applications on boats to 8M(26')Control line applications on larger yachtsMaterials:Ball Bearings - High compression stregnth carbon black AcetalStage 2 Bearing - Glass fiber reinforced, MoS2 impregnated NylonFrame/Cheeks - Toughened, glass fiber reinforced NylonSheave - Carbon fiber reinforced, PTFE impreganated NylonHead fitting: Grade 316 stainless steelSpecifications:Sheave Ø: 40mm(1-9/16")M.W.L.: 325kg(715lbs)B. L.: 650kg(1,430lbs)Weight: 44g(1.6oz)

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