... deep groove ball bearing , self-aligning ball bearings, cylindrical roller bearings, spherical roller bearing , tapered roller bearing , thrust ball bearing , thrust roller bearing 3. Bearing name :Deep ... steel ,stainless steel ,bearing steel6.Seal type: open, Z, ZZ, RZ, RS,2RS 7.High precision, low noise 8. Material ... machinery, construction machinery, and so on. Agular Contact Bearing Retainer