... bearing ball good quality used in bearing 3)high precision,good surface1)materia:(AISI E52100, 100Cr6, SUJ2)+(SUJ3, ... 6)Using:1. General industry for automobile, motorcycle, bicyclemanufacturing, special bearings & micro – ball for theelectronics industry..2. High accuracy & ... low noise motor bearing& householdappliance bearings 3. High - speed, low noise special bearing 4. Ball valves for liquid and ...