Vibration Grade

In terms of vibration, GBM deep groove ball bearings fall into groups V, V1, V2 V3 by vibration velocity gauge and / or groups Z, Z1, Z2, Z3, Z4 by vibration acceleration gauge.

Z & V: For general applications. Standard deep groove ball bearings in compliance with GB are in these groups.
Z1 & V1: For applications where there are primary requirements for vibration.
Z2 & V2: For Y electric motors or equivalent where there are special requirements for vibration.
Z3 & V3: For applications where there are strict requirements for vibration.

Vibration Classification of Radial Ball Bearings in Velocity Measure (Unit: μm/s)
d (mm)	Class V			Class V1			Class V2			Class V3
	L	M	H	L	M	H	L	M	H	L	M	H
5	110	72	60	90	60	50	58	36	30	35	21	18
6	110	72	60	90	60	50	58	36	30	35	21	18
7	130	96	80	110	80	65	72	48	40	44	28	24
8	130	96	80	110	80	65	72	48	40	44	28	24
9	130	96	80	110	80	65	72	48	40	44	28	24
10	160	120	100	140	100	85	90	60	50	55	35	30
12	160	120	100	140	100	85	90	60	50	55	35	30
15	210	150	120	180	130	100	110	78	60	65	46	35
17	210	150	120	180	130	100	110	78	60	65	46	35
20	260	190	150	220	160	125	130	100	75	80	60	45
22	260	190	150	220	160	125	130	100	75	80	60	45
25	260	190	150	220	160	125	130	100	75	80	60	45
28	260	190	150	220	160	125	130	100	75	80	60	45
30	300	240	190	250	200	160	150	120	100	90	75	60
32	300	240	190	250	200	160	150	120	100	90	75	60
35	300	240	190	250	200	160	150	120	100	90	75	60
40	360	300	260	300	250	220	180	150	130	110	90	80
45	360	300	260	300	250	220	180	150	130	110	90	80
50	420	320	320	350	270	270	210	160	160	125	100	100
55	420	360	360	350	300	300	210	180	180	125	110	110
60	480	360	440	400	300	370	240	180	220	145	110	130

Gauging conditions:
 Low frequency band (L): 50 - 300 Hz
 Medium frequency band (M): 300 - 1,800 Hz
 High frequency band (H): 1,800 - 10,000 Hz
 Test Speed: 1,800 rpm

Vibration Classification of Radial Ball Bearings in Acceleration Measure (Unit: dB)
d (mm)	6000 series				6200 series					6300 series
	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
22	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
28	49	47	43	39	50	48	44	41	37	52	50	45	42	38
30	49	47	43	39	50	49	44	41	37	52	50	45	42	38
32	50	48	44	40	51	49	45	42	38	42	51	46	43	39
35	51	49	45	41	52	50	46	43	39	54	52	47	44	40
40	42	51	46	42	54	52	47	44	40	56	54	49	45	41
45	55	42	48	45	56	54	49	46	43	58	56	51	47	44
50	57	54	50	47	58	55	51	48	45	60	57	42	49	46
55	59	56	52	49	60	57	42	50	47	72	59	54	51	48