... , ceramic,chrome steel or stainless steel.We manufacture more than 5,000 different types of miniature small bearings, Most of precision ... :ISO9001:2000 StandardFeatures:1)Tolerance : ABEC-1,ABEC-3,ABEC-5, ABEC-7(P0,P6,P5,P4)2)Vibration Level : V4 ... :1.Assembly 2.Windage test 3.Cleaning 4.Rotary Test 5. Greasing and gland 6. Noise Inspection 7.Appearance Inspection 8 ...