RONSTAN–Series 55 Orbit BB Single Block with Becket, Swivel Mount
Series 55 Orbit BB Single Block with Becket, Swivel Mount
|Diameter||3/8 Inch or 10 mm|
|Integral Cleat||No Integral Cleat|
|Mount Type||Swivel Shackle|
|Safe Working Load||1100 Pounds|
|Sheave Diameter||2 5/32 Inches or 55 mm|
Series 40 Ball Bearing Blocks are suitable for sheet applications on dinghies, sportboats and small one-design keelboats, and for control lines on larger boats. They feature a precision two-stage bearing system for better durability, lighter weight and low-friction performance. Models with swivels feature stainless steel shackles.
- Sheave: Carbon fiber reinforced, PTFE impregnated engineered nylon
- Ball bearings: High-compression-strength carbon black acetal; Stage 2 bearing: Glass-fiber-reinforced MoS2 impregnated engineered nylon
- Cheek material/finish: Toughened glass-fiber-reinforced nylon
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