Detailed description
1. 61904 2RZ deep groove ball bearings
2 size :20*37*9mm
3.seal : 61904 Z,61904 ZZ,61904 RS,61904 2RS,61904 2RZ
4.tolerance cold:ABEC-1,ABEC-3,ABEC-5,ABEC-7
5.vibration level:V4,V3,V2,V1
6.material: bearing steel ,GCr15
7.retainer :PTEE,nylon,or (stainless) steel
8.application :speed changing box,instrument,electrical machine,home appliance,agriculture machine,ect.









