KOYO Deep groove ball bearings 1. low noise and high speed 2. can bear large load 3. durable 4.good ... automobiles, tractors, machine tools, motors, pumps, agricultural machinery, and textile machinery and other high speed facility.4. We supply: 606, 6000, 6200, 6300, ... 61900 and other series, with ZZ, 2RS, OPEN available; ...