Close-up of NSK BD20-15DWA Japan sealed bearing in the center of…

Extreme close-up of an idler or tensioner pulley's sealed ball bearing, stamped "NSK BD20-15DWA JAPAN" around the shield, with light corrosion and grease residue on the inner race and center bore. The black pulley face shows a smooth machined belt surface.

AI caption March 2009 · Photo 115 of 119