Bearing Noise and Vibration

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On 2020-08-10

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Bearing Noise and Vibration Detection:

Bearing noise and vibration – important metrics for bearing quality

Usually we use instrument S0910-1 to detect the noise of ball bearings.
We devide bearing noise into four levels: Z1, Z2, Z3, and Z4.
The higher the level, the lower the noise.

While for bearing vibriation, we use the instrument BVT-1 to detect.
We divide bearing vibration into four levels: Z1, Z2, Z3, and Z4.
The higher the level, the smaller the vibration.

Noise Levels Parameter Table:

Bearing Diameter	SO901-1（dB）
Bearing Diameter	Z1	Z2	Z3	Z4
㎜	≤	≤	≤	≤
3	34	32	28	23
4	34	32	28	23
5	36	34	30	25
6	36	34	30	25
7	38	35	31	26
8	38	35	31	26
9	40	36	32	27
10	42	38	33	28
12	43	39	34	29
15	44	40	35	30
17	44	40	35	30
20	45	41	36	31
25	46	42	38	33
30	47	43	39	35
35	49	45	41	36
40	51	46	42	38

Vibration Levels Parameter Table:

Diameter	V (um/s)			V1 (um/s)			V2 (um/s)			V3 (um/s)
d	V (um/s)			V1 (um/s)			V2 (um/s)			V3 (um/s)
mm	Low Frequency	Middle Frequency	High frequency	Low frequency	Middle Frequency	High frequency	Low Frequency	Middle Frequency	High frequency	Low Frequency	Middle Frequency	High Frequency
3,4	80	44	44	60	35	32	48	26	22	31	16	10
5,6	110	72	60	74	48	40	58	36	30	35	21	11
7,8,9	130	96	80	92	66	54	72	48	40	44	28	12
10,12	160	120	100	120	80	70	90	60	50	55	35	15
15	210	150	120	150	100	85	110	78	60	65	46	18
17	210	150	120	150	100	85	110	78	60	65	46	25
20	260	190	150	180	125	100	130	100	75	80	60	25
22,25	260	190	150	180	125	100	130	100	75	80	60	32
28	260	190	150	180	125	100	130	100	75	80	60	40
30,32	300	240	190	200	150	130	150	120	100	90	75	40
35	300	240	190	200	150	130	150	120	100	90	75	45
40	360	300	260	240	180	160	180	150	130	110	90	50
45	360	300	260	240	180	160	180	150	130	110	90	60
50	420	320	320	280	200	200	210	160	160	125	100	70

Is Bearing Accuracy Standard Related to Noise Level?

Generally, the accuracy of bearings has nothing to do with the noise level. They are two different grade standards.
As long as we measure bearing accuracy according to rotation accuracy and dimensional accuracy. While we judge noise by the decibel value of the abnormal sound during rotation. One is size and the other is decibel value.
Therefore, bearing accuracy standard has nothing to do with noise level.

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Bearing Noise and Vibration Detection:

Noise Levels Parameter Table:

Vibration Levels Parameter Table:

Is Bearing Accuracy Standard Related to Noise Level?