Description
Ronstan Series 50 Ball Bearing Block – Single Loop Top – Marine Boat Replacement Part is organized for lighting & visibility shoppers who need a clear, professional marine parts buying experience.
Series 50 Ball Bearing Block – Single Loop Top 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. Features: Low friction, 2-stage ball bearing system High static and dynamic load capacity Lightweight Cheek cut-outs for easy bearing maintenance Specifications: Max. Rope diameter (in): 1/2″ M.W.L. (lb): 1100lbs Sheave diameter (in): 2″ B.L. (lb): 3310lbs Weight (oz): 3.4oz Materials: Acetal ball bearings UV-stabilized acetal sheave Grade 316 stainless steel load strap and head fitting Impact and UV-resistant, fiber-reinforced nylon cheeks
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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