... .Quality Standard:ISO9001:2000 StandardFeatures:1)Tolerance : ABEC-1,ABEC-3,ABEC-5,ABEC-72)Vibration Level : V4,V3,V2,V13 ... equipment ect.Technology&QC Process:1.Assembly 2.Windage test 3.Cleaning 4.Rotary Test 5. Greasing and gland 6. Noise ...