... bearings:1,ABEC-3,5;Z2V2,Z3V3 2,High speed 3,End cover:ZZ,RS 4,Noise ... 400-600 degrees by 1.3 degrees high temperature carburization of high toughness Cage guided needle group G2 group ... with the rest,no axial fixtures.Even in the high-speed,high load conditions,but also to to ensure ... long term without lubrication,as a result of high temperature lubrication intervals,thus ensuring its long-term ...