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Vibration and Noise

The vibration and noise of bearings are classified as three classes as Z1,Z2 and Z3.lt is measured by the instrument of SO910-1. For special requirement, it is measured by BVT-1 and classified as V1 ,V2 and V3. The data are shown as below. Customer need to mark the requirement of vibration and noise class on the order.

Bore diameterd (mm)	SO910-1(dB)			BVT-1 (um/s)
	Z1 ≦	Z2 ≦	Z3 ≦	V1 ≦			V2 ≦			V3 ≦
	Z1 ≦	Z2 ≦	Z3 ≦	LF	MF	HF	LF	MF	HF	LF	MF	HF
4	35	33	31	90	60	50	58	36	30	35	21	18
5	36	34	32	90	60	50	58	36	30	35	21	18
6	36	34	32	90	60	50	58	36	30	35	21	18
7	37	34	32	110	80	65	72	48	40	44	28	24
8	38	35	33	110	80	65	72	48	40	44	28	24
9	40	36	34	110	80	65	72	48	40	44	28	24
10	41	38	35	140	100	85	90	60	50	55	35	30
12	43	39	35	140	100	85	90	60	50	55	35	30
15	44	40	35	180	130	100	110	78	60	65	46	35
17	45	41	36	180	130	100	110	78	60	65	46	35
20	46	42	37	220	160	125	130	100	75	80	60	45