PURPOSE: To prevent occurrence of jarring noise to restrict generation of friction by filling a rolling bearing holding rolling elements between its inner race and outer race with a lubricating grease made of a base oil having a specific kinetic viscosity at a temperature of 40°C.
CONSTITUTION: Rolling elements 3 are inserted between an outer race 1 and an inner race 2, and the rolling elements 3 are held so that they can freely roll by a corrugated retainer made as a unit by connecting rivets. A lubricating grease G is inserted and sealed between the inner race 2 and outer race 1 by sealing body. When a rolling bearing of such construction is filled and sealed with the lubricating grease G made of a base oil whose kinetic viscosity is in the range from 30cst to 60cst at a temperature of 40°C, an oil film formed between the rolling elements and the inner and outer races 2, 1 becomes thicker than conventional films, and there is no significant wear even when the bearing caries higher load or even in a rolling bearing having many slip planes. Further, since a slip factor between the rolling elements 3 and the inner and outer races 2, 1 is low, jarring noise can be restricted.
MOMONO TATSUNOBU
KONDO YUKARI
TANAKA SADAYUKI
| JPH01307516A | 1989-12-12 |