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Premium Marine Quality Parts

Ronstan

Ronstan Series 20 Ball Bearing Block - Single

SKU 55131 MPN RF20100 UPC 9316800255504 MFR Ronstan

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Toronto, ON Vancouver, BC NJ, Warehouse FL, Warehouse

On Back Order

This item is currently on backorder. You can still place an order, but it will only ship once it’s back in stock.

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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)

Product Specifications

Dimensions4" L × 2" W × 1" H
Shipping Weight0.1 lb
Country of OriginINDONESIA
Harmonized Code8483.50.90.40

Accessories

  • SKU 55118 — MFG# RF1850S
Northern Marine Canada
Proudly Canadian Owned & Operated!
Serving customers across Canada & the USA with marine parts and accessories.
Canadian Head Office:
Kingston, Ontario, Canada
Warehouse Locations:
Toronto, Ontario, Canada
New Jersey, USA
Florida, USA

About Us

Northern Marine is a Canadian supplier of premium marine and RV parts and accessories from top industry brands. We focus on quality, accurate listings, and dependable fulfillment so you can maintain, repair, and outfit your boat or RV with confidence.

Our goal is simple: get you the right parts, shipped fast, with straightforward service you can count on.