Patent ID: 9074621
Filing Date: 2015-07-07
Classification: F16C

Abstract:
1. A roller bearing for automobiles, wherein surfaces of rolling elements of the roller bearing are provided with recessed cavities at random such that said surfaces have a combination of a surface roughness parameter Ryni in a range of 0.4 μm≦Ryni≦1.0 μm, an Sk value of not more than −1.6, a surface roughness parameter Rymax in a range of 0.4 μm-1.0 μm, and a surface roughness parameter Rqni such that 0.05 μm≦Rqni≦0.09 μm, wherein the value of the ratio, Rqni (L)/Rqni (C), where the Rqni (L) is the axial surface roughness and the Rqni (C) is the circumferential surface roughness, is not more than 1.0.