| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a rolling bearing for a motor, in which the occurrence of electric erosion is reduced, and which is suppressed in the reduction of the service life and the deterioration in incorporation performance caused by a high Young's modulus. <P>SOLUTION: A ball for constituting a grease-sealed deep groove ball bearing 1 rotatably supporting a main shaft of the motor to a frame oppositely arranged to the main shaft, is composed of a sintered body expressed by a composition formula of Si<SB>6-Z</SB>Al<SB>Z</SB>O<SB>Z</SB>N<SB>8-Z</SB>, containg βsialon as main component, satisfying 0.1≤z≤3.5, and a residual part of an impurity, and having a Young's modulus of 180-270 GPa. <P>COPYRIGHT: (C)2010,JPO&INPIT |
