GREASE COMPOSITION FOR HIGH SPEED HEAVY DUTY MACHINE TOOL AND ROLLING BEARING ENCLOSING THE GREASE COMPOSITION

摘要

PROBLEM TO BE SOLVED: To provide a grease composition that can sufficiently maintain excellent lubricity under the ultrafast heavy duty in which a dmn value exceeds one million and a maximum contact surface pressure becomes at least one GPa, and to provide a rolling bearing.;SOLUTION: The grease composition is used for lubricating the rolling bearing for a high speed heavy duty machine tool in which the product (dmn value) of a ball rotation diameter and a number of revolutions exceeds one million, and the maximum contact surface pressure becomes at least one GPa, and includes: an alkyl diphenyl ether oil as a base oil; a urea compound as a thickener; and further zinc dialkyldithiocarbamate as an additive.;COPYRIGHT: (C)2012,JPO&INPIT