| 摘要 |
PURPOSE:To reduce the friction torque by lowering the ratio h/delta to 1 or less, where h is the thickness of oil film and delta at least one of the surface roughnesses, among those of the orbital surface of inner or outer ring or rolling surface of rolling body, which is made to be 0.3-0.5mum rms. CONSTITUTION:In this rolling bearing, taking notice of the tendency that the rolling friction becomes less in proportion to the increase of the value representing the surface roughness of rolling contact surface, the following means is taken. At least one of three surface roughnesses delta, that is, the roughness of orbital surface of inner or outer ring of rolling bearing or that of rolling surface of rolling body, is made to be 0.3-0.5mum rms, and the ratio of the thickness h of intervening oil film to the said roughness delta, h/delta, is made to be 1 or less. |
