Ronstan Series 55 Ball Bearing Orbit Block™ - Single - Becket - Swivel Head
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B Series 55 Ball Bearing Orbit Block 153 - Single - Becket - Swivel Head B br br B Lightweight B br Kilogram for kilogram of working load BB and RT Orbit Blocks 153 are the worlds 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 br br 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 br br 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 br br B Highest Working Load In Its Class B br 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 br br The floating sheave and bearing system is supported by a fiber-reinforced load frame The design was computer modelled to be stress optimised The Dyneema reg Link is produced from FSE Robline SK75 fiber which is 10 times stronger and lighter than steel and provides the final connection from the block to the load point br br B Features B br UL LI Ultra Lightweight br LI Low friction 2-stage Orbital ball bearing system br LI Highest working load in its class br LI Low profile and compact br LI High performance cleating br LI Swivel shackle head for unlimited block rotation br LI Stainless steel shackle head for ultimate durability and compatibility with harsh fixing points br LI Ultra low profile integrated becket LI UL br br B Applications B br UL LI Mainsheet systems on dinghies sportsboats and small keelboats to 9M 30 br LI Spinnaker sheets on dinghies sportsboats and small keel boats to 9M 30 br LI Halyard Vang and Backstay application on boats to 8M 26 br LI Control line applications on larger yachts br LI Ideal use for mainsheet systems and spinnaker sheets on dinghies sportsboats and small keel boats to 9M 30 br LI Also ideal with halyard vang and backstay applications on boats to 8M 26 br LI Spinnaker sheets on sportsboats and small keel boats lateral lead blocks br LI Control line applications on larger yachts LI UL br br B Materials B br UL LI Ball bearings - High compression strength carbon black Acetal br LI Stage 2 bearing - Carbon fiber reinforced PTFE impregnated Nylon br LI Frame Cheeks - Toughened glass fiber reinforced Nylon br LI Rope Link UV stabilized multi-strand impregmented SK75 Dyneema reg br LI Sheave Carbon fiber reinforced PTFE impregnated Nylon br LI Head fitting Grade 316 stainless steel LI UL br br B Specifications B br B Sheave 216 B 55mm 2-5 32 br B Max Rope 216 B 10mm 3 8 br B M W L B 500kg 1 100lbs br B B L B 1 000kg 2 200lbs br B Weight B 88g 3 1oz --- cis2 mmxtmJVt --- br
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