1.Size:607zz-699zz. 2.Tolerance:p0,p6,p5,p4 3.ISO 9001:2008 4.Mold:OPEN,Z,ZZ,RZ,2RZ, ... ,609zzQuality Standard:ISO9001:2000 StandardFeatures:1)Tolerance : ABEC-1,ABEC-3,ABEC-5, ABEC-7(P0,P6,P5,P4)2)Vibration ... texile machinery etcTechnology&QC Process:1.Assembly 2.Windage test 3.Cleaning 4.Rotary Test 5. Greasing and gland 6. Noise ...