The SKF 6308MC4SQ77 is a high-performance INSOCOAT deep groove ball bearing designed for applications requiring electrical insulation. It features a 40 mm bore, 90 mm outer diameter, and 23 mm width. The bearing incorporates a machined brass cage (M suffix) and has a C4 radial internal clearance, which is greater than standard C3. The SQ77 suffix denotes a ceramic coating on the outer ring, providing excellent electrical insulation properties to prevent damage from stray currents. This robust bearing is suitable for demanding industrial environments.