... high speed electric motors; automotive components, pumps,machinery.Type : single row self-aligning roller bearings 20200 series, 20300 ... series, 20200K series, 20300K series, Double row self-aligning roller bearings 23100 series , 21300 series, 22200 ... are some of our competitive advantages. The inspection process: Assembly---Rotary test---Noise inspection---Appearance inspection---Cleaning--- ...