Noise and Vibration testing device BVT-1 .

The vibration and noise of bearings are classified in four classes Z1, Z2, Z3, and Z4. It is meansured by the instrument of S0910-1. For special requirement, it is measured by BVT-1 and classified as V1, V2, V3 and V4. Different vibration & noise requirement should be menstioned in order.