| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent damage, such as peeling, and improve durability, and thereby coping with a higher speed rotation, in a rolling bearing for a machine-tool spindle driving spindle motor. <P>SOLUTION: In the rolling bearing for the machine-tool spindle driving spindle motor, a grease composition is enclosed in a bearing space formed by an inner ring, an outer ring and a rolling element, where the grease composition containing: synthetic oil as base oil; a diurea compound as a thickener; and at least one of a rust-prevention additive which is selected from zinc naphthenate and succinic acid derivative and accounts for 0.25-5 mass% of the total grease amount. <P>COPYRIGHT: (C)2013,JPO&INPIT |
