Grease-lubricated rolling bearings

摘要

A grease-lubricated rolling bearing containing an improved grease which can prevent noise of the bearing immediately after the bearing is actuated even at a minimum environmental temperature expected in a cold district (-40 DEG C.). The grease contains a base oil, and a thickener added to the base oil so that the grease has an unworked penetration at -20 DEG C. of 190-290 and, preferably, a worked penetration at 25 DEG C. of 220-310.