... open, Z, ZZ, RZ, RS,2RS 7.High precision, low noise 8. Material: Gcr15, Gcr15Simn, G20Cr2Ni4A, Gr18Mo 9. Outside diameter ... - 200 mm 11. Application: Gearbox, instruments and meters, electric motor, electric appliance, internal combustion engines, transportation vehicles, agricultural machinery, ... construction machinery, construction machinery, and so on. No-noise Deep Groove Bearing Cage