Ronstan Series 40 Orbit Block Cheek with Ball Bearing

The Ronstan Series 40 Orbit Block Cheek with Ball Bearing is an exceptional sailing block designed for performance and durability. With its ultra-lightweight construction and low friction 2-stage Orbital ball bearing system, this block offers unmatched efficiency and reliability. It is specifically engineered to provide the highest working load in its class while maintaining a low profile and compact design.

Product Features:

• Ultra Lightweight
• Low friction 2-stage Orbital ball bearing system
• Highest working load in its class
• Low profile and compact
• High performance cleating
• Base suits curved mounting surface
• Low mounting points for maximum strength

Lightweight:

Kilogram for kilogram of working load, BB and RT Orbit Blocks™ are the world's lightest. The unique orbital design allows the bearing to only be in the active areas of the floating sheave. This minimizes the mass of the inactive return race and hub.

Weight and bulk are further reduced in the different block configurations. The ball bearing single and becket block has a through-sheave becket arrangement. The result? The lowest weight possible.

Multi-sheave blocks have only single intermediate cheeks and an ultra-light and efficient head arrangement. This gives a 30% weight saving advantage over the nearest competitor. Other brands just link together their single blocks. This results in unnecessary double cheeks between each sheave, held together by a heavy steel channel across the top of the block.

Highest Working Load In Its Class:

The orbital ball-bearing arrangement gives the largest possible bearing race diameter. This maximizes load performance. The proven Ronstan 2-stage bearing system features high compression grade acetal ball bearings and a secondary full-contact bearing. This gives minimum friction across the full working load range.

The floating sheave and bearing system is supported by a fiber-reinforced load frame. The design was computer modeled to be stress optimized.

Applications:

• Mainsheet systems on spinnaker sheet on dinghies to 5m (16ft)
• Spinnaker sheets on dinghies, sportsboats, and small keel boats to 5m (16ft)
• Halyard, vang and backstay applications on boats to 8m (26ft)
• Control line applications on larger yachts

Materials:

• Ball Bearings - High compression strength carbon black Acetal.
• Stage 2 Bearing - Glass fiber reinforced, MoS2 impregnated Nylon
• Frame/Cheeks - Toughened, glass fiber reinforced Nylon
• Sheave - Carbon fiber reinforced, PTFE impregnated Nylon

Learn More

• Ball Bearing on Wikipedia
• Nylon on Wikipedia

Specifications

Product: Ronstan Rf45151 Series 40 Ball Bearing Orbit Block Cheek

Brand: Ronstan

Model: RF45151

Additional Shipping Information:

Shipping Weight: 0.20 lb

Shipping Height: 1.00 in

Shipping Width: 2.00 in

Shipping Length: 5.00 in

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If your return is accepted, we will provide an exchange for the returned item, a non-transferable merchandise credit, a credit to the payment card or original payment method, a check, or another appropriate remedy that we determine in good faith. To request a return merchandise authorization (RMA), customers can contact us on our website or email us at customerservice@atlantisshowroom.com. We will issue an RMA number and provide instructions for returning the package within a reasonable time frame, usually within 1-3 business days.