The new Series 40 ball bearing Orbit Blocks™ provide the perfect balance of strength, performance, and reliability. They offer class-leading dynamic and static load ratings, the highest available in this size of performance blocks. Lightweight and strong toughened glass fibre reinforced nylon cheeks replace stainless steel straps used in traditional utility blocks - the perfect balance of performance and reliability.
The RF48100 Single Block features a 40mm (1 9/16") sheave and incorporates our 2-stage bearing system. Ball bearings minimise friction while a secondary full-contact bearing maintains low friction across the full working load range. This product does not have a locking headpost, which is only available in the multiple sheave variants. RF48100 is free swivel rotation only. The RF48100 can accommodate a maximum rope diameter of 10mm (3/8").
Specifications:
- Type of Block: Single
- Sheave diameter: 40mm
- B.L.: 800kg
- M.W.L.: 400kg
- Max. Rope diameter: 10mm
- Weight: 60g
- Pin: 4mm
Applications:
- Mainsheet systems and spinnaker sheets on dinghies, off-the-beach catamarans and sportsboats to 8m (26ft)
- Halyard, vang, and backstay applications on boats to 8m (26ft)
- Control line applications on larger yachts
Materials:
- Sheave and Ball Bearings: High compression strength acetal
- Frame/cheeks: Toughened, glass fibre reinforced nylon
- Head fittings, hubs, and fixtures: Grade 316 stainless steel
Notes: This product does not have a locking headpost, which is only available in the multiple sheave variants. RF48100 is free swivel rotation only
Smart VIP Price Promise
Our prices are very Smart at Smart Marine! Our Smart VIP Membership and committment to great deals makes sure of that, but if you find a lower price, tell us- we will match it!*

Price Promise Terms & Conditions
- Excludes limited time specials, clearances, non-stocked products, overseas websites, price comparison websites and eBay/TradeMe.
- Applies to identical products, in stock in NZ with pricing valid at time of price match request and purchase, with evidence supplied.
- Excluded Products: clearance, run-out, distress, damaged/soiled, parallel imported, non-stocks, trade quotes, commercial quantities, credit account holders, insurance claims, services, typos, overseas websites, price comparison websites, auction websites.
- Free product, offers, sales and promotions cannot be redeemed with price matches.
- The price match applies to the total cost to buy including shipping, taxes and fees.
- Approved Price Promise Matches and purchases can only be redeemed with our store crew. Please contact your closest store with stock.
- Short term finance may not be available with some price matched purchases. Please enquire.