Ronstan Series 30 Ball Bearing Orbit Block, Single Becket Swivel Shackle Head

Series 30 Ball Bearing Orbit Block™ - Single - Becket - Swivel Shackle Head

Ball Bearing Orbit Blocks™ boast the highest strength-to-weight ratio available. This is achieved through all-composite reinforced polymer materials and multiple attachment options.
Their precision design provides the optimum number of ball bearings for minimum friction while weight reduction is achieved through the use of fiber-reinforced composites in the block head, cleat arms and beckets.

Features:

Lightweight

Highest working load in its class

Secure, versatile and secure attachement

Low profile and compact

Ultra low profile thru-sheave becket

Low friction 2-stage ball bearing system provides consistent performance over the full working load range

Applications:

Mainsheet systems and spinnaker sheets on dinghies to 5M(16')

Halyard, vang and backstay applications on boats to 5M(16')

Control line applications on larger yachts

Materials:

Sheave: High compression strength carbon black Acetal

Ball Bearings: High compression strength Acetal

Frame/Cheeks: Toughened, glass fiber reinforced Nylon

Link: UV stabilized, multi-strand impregnated SK75 Dyneema®

Specifications:
Sheave Ø: 30mm(1-3/16")
Max. Rope Ø: 8mm(5/16")
M.W.L.: 300kg(660lbs)
B. L.: 600kg(1,320lbs)
Weight: 32g(1.1oz)