This machine is designed by our company especially for the assembly of the small size bearings, and with the meris of high efficiency, high matching rates, easy maintenance, low ball damage and convenient work unit changing, it meets the needs of bearing assembly of the future. The inner rings and outer rings transfer in the machine's railway, which simplifies the moving and can work fluently even at 2.5 second a cycle. It has automatic inspection of the marked rings'dimension to avoid the time and temperature alteration, which assure the quality of bearing clearance. It's 1 to 20 matching mode can achieve 10 times higher matching rate the latest machines. All to all, it is the preferred machine for assembly line.