The bearings used on the motor must withstand considerable radial loads and high speeds. The precision bearings produced by Koro bearings can produce stable, low-noise, and long-life effects when used in motors, gearboxes, and reducers.

The size range of micro motor bearings provided by Koro Bearing Company is metric and imperial series bearings with an inner diameter of 1-20mm and an outer diameter of 60mm or less. The accuracy levels of these bearings are ABEC1, respectively, ABEC3，ABEC5，ABEC7。