Ronstan Series 40 Ball Bearing Orbit Block Single Becket Swivel Head for Boats

Series 40 Ball Bearing Orbit Block Single Becket Swivel Head

Core Blocks is a true all round solution. A tuned 2-stage bearing system provides excellent performance across the full working load range with an integrated thrust bearing feature and the resilience to handle high dynamic or static loads. Acetal sheave, alloy cheeks and stainless fixings complete the durable package. For reliability and long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing.

Lightweight
Kilogram for a kilogram of working load, BB Orbit Blocks is the world's lightest. The unique orbital design allows the bearing to only be in the active areas of the floating sheave.
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.

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

Features:


Ultra Lightweight

Low friction 2-stage Orbital ball bearing system

Highest working load in its class

Low profile and compact

High performance cleating

Swivel shackle head for unlimited block rotation

Stainless steel shackle head for ultimate durability and compatibility with harsh fixing points

Ultra low profile integrated becket

Applications:


Spinnaker sheets on dinghies, sports boats and small keel boats to 5M(16')

Halyard, vang and backstay applications on boats to 8M(26')

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

Head fitting: Grade 316 stainless steel

Specifications:
Sheave Ø: 40mm(1-9/16")
M.W.L.: 325kg(715lbs)
B. L.: 650kg(1,430lbs)
Weight: 44g(1.6oz)