As a professional Tapered Roller Bearings 30312 30310 manufacturer, we are strong strength and complete management. UMZ bearing Application: Material:chrome steel(GCr15),carbon steel(GCr11) Steel Type: open, Z, ZZ, RS, 2RS, 2RZ Accurancy lever: ABEC-1, ABEC-3, ABEC-5 Vibration level codes: V1, V2, V3 Clearance: C2, C0, C3, C4, C5
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