tapered roller bearings for construction machinery of the traveling speed reducer

摘要

PROBLEM TO BE SOLVED: To provide a more durable roller bearing for a running speed reducer for construction machinery.;SOLUTION: The roller bearing 10 for a running speed reducer for construction machinery includes: an inner ring 11; an outer ring 12; a conical roller 13, which is a rolling element disposed between the inner ring 11 and the outer ring 12; and a retainer 14 composed of a resin composition containing a rubber material as an impact modifier in a resin, wherein the resin composition includes a polyamide, glass fibers and the rubber material having at least one functional group selected from carboxyl group, ester group and glycidyl group in molecules.;COPYRIGHT: (C)2012,JPO&INPIT