... 2 Less coefficient of friction 3 High quality, goog service Self-aligning Ball Bearings 1. High accuracy2. Low noise3. Low weight4. Can ... , motors, medical devices, motorbikes, textile machines, autos and other areas. Self-aligning Ball Bearings 1203K 111203 17x40x12 0.07 1204K 111204 1204K ... 2320K 2320K 100x215x80 12.3 2221K 111521 2221SK 2221K 105X190X50 Self-aligning Ball Bearings