RESIN BALL-CAGE FOR DOUBLE ROW ROLLER BEARING AND DOUBLE ROW ROLLER BEARING

摘要

PROBLEM TO BE SOLVED: To provide a resin ball-cage and a double row roller bearing, capable of reducing heat generation and abrasion caused by the contact of ball-cages to each other even when it is assembled in the double row roller bearing.;SOLUTION: This resin ball-cage 4 comprises an annular part 4a and a plurality of pole parts 4b projecting from the annular part 4a. A surface roughness of an opposite face 5 of the annular part 4a kept into contact with another ball-cage in a state that the ball-cage is assembled and rotated in the double row cylindrical roller bearing 10, is less than 0.6 μmRa.;COPYRIGHT: (C)2005,JPO&NCIPI