Patent ID: 7988366
Filing Date: 2011-08-02
Classification: C23C,C25D,F16C

Abstract:
1. A metal retainer for a rolling bearing which retains rolling elements of said rolling bearing, a grease having a lithium soap, a lithium complex soap or a urea compound as a thickener or a grease having an ether type synthetic oil or a mineral oil as a base oil being enclosed in said rolling bearing wherein said metal is a cold rolled steel, a surface of which is chromated with trivalent chromium after rust-preventive treatment is applied to said surface thereof; and said chromating with said trivalent chromium is a surface treatment performed by cleaning said cold rolled steel with water after said rust-preventive treatment, immersing said cold rolled steel in a solution of nitric acid, cleaning said cold rolled steel with water again, immersing said cold rolled steel in a trivalent chromium bath, and drying said cold rolled steel.