Deep groove ball bearing 1.GCr15, GCr15SiMn 2.High precision,long life ... ,RS,2RS deep groove ball bearing1. with OPEN,Z,ZZ,RS,2RS,N,NR products2. wide varieties,inner packing:plastic bag,tube ... , as a widely used type of bearings in machinery industryDeep groove ball bearings mainly take radial load as well as take ...