*The inside diameter of(mm): 20
*Accuracy level: P0
*Outer diameter(mm): 47
*Width(mm): 31
*Standard encdoing: GB/T3882-2017
*Cage and materials: Bearing steel
*Cr(kN): 9.88
*Cor(kN): 6.2
*Grease lubrication limit speed (rpm): 4000
*Oil lubrication limit speed (rpm): 4200