... ball bearing , self-aligning ball bearings, cylindrical roller bearings, spherical roller bearing , tapered roller bearing , thrust ball bearing , thrust roller bearing 3. Bearing name : ... type: open, Z, ZZ, RZ, RS,2RS 7.High precision, low noise 8. Material: Gcr15, Gcr15Simn, G20Cr2Ni4A, Gr18Mo 9 ... , construction machinery, construction machinery, and so on. Cylindrical Roller Bearing Retainer