40 mm Ball Bearing Block - Single, Swivel, Becket Track & Travellers The 40 mm sheave is

The 40 mm sheave is supported by stainless steel ball bearings

The fitting is anodized aluminium with a shock absorbing rubber buffer

The jib sheet is led to a car which moves to leeward during the tack with no need to touch the sheet

designed for dynamic applications under medium loads

40 mm Ball Bearing Block - Single, Swivel, Becket Track & Travellers The 40 mm sheave isThe BBB40 Single Becket Swivel Block is a 40 mm ball bearing block designed for dynamic applications under medium loads. It features a swiveling shaft with swivel lock a plastic washer which is placed between block body and shackle for fixed 0 or 90 shackle position. The stainless steel ball bearings provide smooth rotation, while the glass fiber reinforced cheeks and Acetal bearing cage reduce friction. Ideal for moderate and dynamic loads with