BEARING RETAINER MADE OF COMPOUND MATERIAL OF GLASS FIBER REINFORCED TYPE

摘要

PURPOSE:To improve lubricating property, extend a service life and suppress heat generation by melting and removing glass fibers on the machined surface part of a bearing retainer made of a self-lubricating type material reinforced by adding glass fibers. CONSTITUTION:A partially processed material of a short cylindrical shape is formed with a glass fiber reinforced PTFE compound material formed by impregnating the PTFE having self-lubricating property into glass-woven cloth. Its outer circumference is then ground to a specified diameter and a number of pocket holes 2 are machined on its peripheral surface to form a bearing retainer 1. The bearing retainer 1 is then immersed in hydrofluoric acid to melt and remove glass fibers to a depth of PTFE layer necessary for working as a lubricant. Accordingly, since the glass fibers are not exposed on the surfaces of the pocket holes 2 down to an appropriate depth, lubricating property is improved, life is extended and heat generation is suppressed.