130 mm Roller Bearing Block - Single, Swivel. Quick-Lock The 40 mm sheave is

The 40 mm sheave is supported by stainless steel ball bearings

The polymer washer insulates stainless components from aluminium to prevent corrosion

Radius: 4000 mm

The 50 mm Fiddle Cam Becket Plain Bearing Block is designed for medium-sized boats for numerous applications

with a row of stainless steel bearings for smooth operation

130 mm Roller Bearing Block - Single, Swivel. Quick-Lock The 40 mm sheave isThe RBB130 Single Roller Bearing Block is built for extreme loads and dynamic applications, featuring a large 130 mm sheave. Made from machined black anodized aluminium and equipped with Torlon roller bearings, this block provides superior strength and smooth operation. The swiveling shaft can be fixed at 0 or 90 with a set screw. Polymer thrust bearings resist side loads, and a polymer washer insulates stainless from aluminium to prevent corrosion.