Bearings used on the motor are under considerable radial load and high speeds.  When precision bearings produced by SUFUL used in motors, gear boxes and reducer, it can produce smooth, low noise, long life effect.
SUFUL bearing company provides micro-motor bearing size range is 1-20nm bore diameter and less than 60nm outside diameter of metric and inch series bearings. The accuracy grade of these bearings are: ABEC1, ABEC3, ABEC5, ABEC7