Description
Ronstan Series 40 Orbit BB Sheave – Marine Boat Replacement Part is organized for deck hardware & rigging shoppers who need a clear, professional marine parts buying experience.
Series 40 Orbit BB Sheave Ball Bearing versions incorporate the 2-stage bearing system using ball bearings to minimize friction and a secondary full-contact bearing to maintain low friction across the full working load range. Specifications: Sheave Captive BB Width: 15.5mm/5/8″ Sheave Diameter: 40mm/1-9/16″ Maximum Rope: 10mm/3/8″ M.W.L.: 400kg/880lbs Weight: 30g/1.1oz
Fitment & Product Details
- Brand / Manufacturer: Ronstan
- Search-optimized by brand, system, part type, and fitment cues.
- Verify compatibility with your original part number, engine model, and application before ordering.
- Built for boat owners, e-commerce shoppers, and professional marine service teams.






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