Description
Ronstan Series 40 Ball Bearing Block – Single – Universal Head – Marine Boat Replacement Part is organized for lighting & visibility shoppers who need a clear, professional marine parts buying experience.
Series 40 Ball Bearing Block – Single – Universal Head Sheaves running on Acetal or Torlon® ball bearings provide high performance & low friction. The 2-stage ball bearing system provides consistent performance over the full load range.Captive Lock universal head can be fixed in either of two planes, or free to swivel as required. Features: Low friction Acetal or Torlon® bearing system Lightweight Cheek cut-outs for easy bearing maintenance Captive Lock universal head Slotted pin shackle eliminates fouled lines Applications: Mainsheet Halyard Vang Spinnaker control lines on off-the-beach catamarans, one design classes and sportsboats up to 8M(26′) Materials: U.V. Stabilized Acetal sheaves
Fitment & Product Details
- Brand / Manufacturer: Ronstan
- Material: stainless steel, nylon
- 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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