- Condition rating scale: New - Unopened factory shipment
- Zip/Postal Code: 93430
- Listed: October 7, 2018 12:33 am
- Expires: This ad has expired
RONSTAN RF55171 SERIES 55BB ORBIT UPRIGHT LEAD BLOCK (2 1/8″ SHEAVE : 3/8″ LINE)
Just by looking at this Series 55 Ball Bearing Orbit upright block, it nearly impossible not to realize that Ronstan is leaps and bounds ahead of all other manufacturers in the design and manufacturing of blocks!
Like all other Ronstan blocks, this lightweight block has the highest working loads in its class. It features Ronstan’s 2-stage bearing system with high compression grade black Acetal carbon black ball bearings and a secondary full-contact bearing to provide minimal friction across the full working load range; a toughened, glass reinforced frame; a carbon fibre-reinforced, PTFE-impregnated Nylon sheave; and style.
Use it for mainsheet and spinnaker sheet systems on dinghies, sportsboats, and small keelboats; halyard, vang, and backstay applications on boats up to 26′ (8m); and control line applications on larger yachts.
Breaking Load (lbs)
Breaking Load (kg)
Max Line Size (in)
Max Line Size (mm)
Safe Working Load (lbs)
Safe Working Load (kg)
Sheave Diameter (in)
Sheave Diameter (mm)
IF YOU HAVE ANY QUESTIONS PLEASE FEEL FREE TO CONTACT ME
ALSO, BE SURE TO CHECK OUT MY OTHER AUCTIONS FOR MORE BOAT STUFF! I’M ALWAYS GLAD TO COMBINE SHIPPING. AND THERE IS A 30% RESTOCKING FEE FOR ANY REMORSE RETURNS.
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Information about the ad poster
- Listed by: om.sailboatcompany
- Member Since: September 19, 2018
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