30 mm Ball Bearing Blocks (BBB 30) – Selden Mast Ltd

Stainless steel ball bearing races, stainless steel ball bearings and glass fibre reinforced sheave for best bearing strength even under high dynamic loads.
Acetal bearing cage to prevent ball-to-ball friction and to reduce weight.
Glass fibre reinforced composite.
An insert washer between the block and the shackle is used to locate the shackle at 0° or 90°. When removed the shackle spins freely.

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