Vibration and Noises

The vibration and noise of bearings are classified in four classes Z1, Z2, Z3, and Z4. It is measured by the instrument of S0910-1. For special requirement, it is measured by BVT-1 and classified as V1, V2, V3 , and V4.
The data are shown in following tables, different vibration and noise requirement should be mentioned in order.

TOLERANCE DATA FOR VIBRATION OF SINGLE BEARING
(Tolerance in ¦Ìm/s)

d mm	V			V1			V2			V3			V4
	Low Brand	Medium Brand	High Brand	Low Brand	Medium Brand	High Brand	Low Brand	Medium Brand	High Brand	Low Brand	Medium Brand	High Brand	Low Brand	Medium Brand	High Brand
5	110	72	60	90	60	50	58	36	30	35	21	18	32	11	11
6	110	72	60	90	60	50	58	36	30	35	21	18	32	11	11
7	130	96	80	110	80	65	72	48	40	44	28	24	38	12	12
8	130	96	80	110	80	65	72	48	40	44	28	24	38	12	12
9	130	96	80	110	80	65	72	48	40	44	28	24	38	12	12
10	160	120	100	140	100	85	90	60	50	55	35	30	45	14	15
12	160	120	100	140	100	85	90	60	50	55	35	30	45	14	15
15	210	150	120	180	130	100	110	78	60	65	46	35	52	18	18
17	210	150	120	180	130	100	110	78	60	65	46	35	52	25	25
20	260	190	150	220	160	125	130	100	75	80	60	45	60	25	25
22	260	190	150	220	160	125	130	100	75	80	60	45	60	30	32
25	260	190	150	220	160	125	130	100	75	80	60	45	60	30	32
28	260	190	150	220	160	125	130	100	75	80	60	45	60	35	40
30	300	240	190	250	200	160	150	120	100	90	75	60	70	35	40
32	300	240	190	250	200	160	150	120	100	90	75	60	70	35	40
35	300	240	190	250	200	160	150	120	100	90	75	60	70	42	45
40	360	300	260	300	250	220	180	150	130	110	90	80	82	50	50
45	360	300	260	240	180	160	180	150	130	110	90	80	82	60	60
50	420	320	320	280	200	200	210	160	160	125	100	100	95	70	70

MAXIMUM VIBRATION ACCELERATION OF SINGLE BEARING
(Tolerance in dB)

d mm	Diameter Series ( 0 )				Diameter Series ( 2 )					Diameter Series ( 3 )
	Z	Z1	Z2	Z3	Z	Z1	Z2	Z3	Z4	Z	Z1	Z2	Z3	Z4
3	35	34	32	28	36	35	32	30	-	37	36	33	31	-
4	35	34	32	28	36	35	32	30	-	37	36	33	31	-
5	37	36	34	30	38	37	34	32	-	39	37	35	33	-
6	37	36	34	30	38	37	34	32	-	39	37	35	33	-
7	39	38	35	31	40	38	36	34	-	-	-	-	-	-
8	39	38	35	31	40	38	36	34	-	-	-	-	-	-
9	41	40	36	32	42	40	37	35	-	-	-	-	-	-
10	43	42	38	33	44	42	39	35	30	46	44	40	37	32
12	44	43	39	34	45	43	39	35	30	47	45	40	37	32
15	45	44	40	35	46	44	41	36	31	48	46	42	38	33
17	46	44	40	35	47	45	41	36	31	49	47	42	38	33
20	47	45	41	36	48	46	42	38	33	50	48	43	39	34
25	48	46	42	38	49	47	43	40	36	51	49	44	41	37
30	49	47	43	39	50	48	44	41	37	52	50	45	42	38
35	51	49	45	41	52	50	46	43	39	54	52	47	44	40
40	53	51	46	42	54	52	47	44	40	56	54	49	45	41
45	55	53	48	45	56	54	49	46	43	58	56	51	47	44
50	57	54	50	47	58	55	51	48	45	60	57	53	49	46
55	59	56	52	49	60	57	53	50	47	62	59	54	51	48
60	61	58	54	51	62	59	54	51	48	64	61	56	53	50