Description
Ronstan Series 20 Ball Bearing Block – Single – Marine Boat Replacement Part is organized for lighting & visibility shoppers who need a clear, professional marine parts buying experience.
Series 20 Ball Bearing Block – Single Features: Low friction High static and dynamic load capacity Lightweight Precision molded Acetal sheaves running on stainless steel or Torlon® ball bearings provide high performance & low friction Applications: Dinghy control lines Dinghy Vangs Cunninghams Traveller controls Materials: U.V. Stabilized Acetal sheaves Stainless steel ball bearings Grade 316 stainless steel load strap and head fitting Impact and UV resistant, fiber reinforced Nylon cheeks Specifications: Sheave Ø: 20mm(3/4″) Max. Rope Ø: 6mm(1/4″) Pin Ø: 3mm(1/8″) M.W.L.: 250kg(550lbs) B. L.: 550kg(1,210lbs) Weight: 20g(0.7oz)
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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