ZHEJIANG FEIYU BEARING FACTORY

Materials

Accuracy

Bearing Clearnce

Shields Seals & Lubrication

Bearing Vibration

VIBRATION Bearing vibration means bearing componment elastic deformation that varies with time and all other movement that deviates from a theoretic position except that neccessary to bearing functions. It has tow modes-acceleration(dB)and velocity(μm/s). Vibration acceteration is examined according to Z,Z1,Z2 and Z3 values. Grade Z is fundamental Z1,Z2 & Z3 successively indicate the vibration level ranges from low to high for detailed requirements. Similary vibration veloctiy is exeamined as per V.V1.V2 & V3. See the following 2 tables. Generalty velocity examition is better than acceleration examinana tion in that it can more reffect bearings' manufacurings level and bearings' inherent quality.

VIBRATION(ACCELERATION)LIMITES FOR SINGLE BEARING

d mm	Diameter Series(1)			Diameter Series(2)			Diameter Series(3)
d mm	Z	Z1	Z2	Z	Z1	Z2	Z	Z1	Z2
10	43	42	38	42	39	35	44	40	37
12	44	43	39	43	39	35	45	40	37
15	45	44	40	44	41	36	46	42	38
17	46	44	40	45	41	36	47	42	38
20	47	45	41	46	42	38	48	43	39
25	48	46	42	47	43	40	49	44	41
30	49	47	43	48	44	41	50	45	42
35	51	49	45	50	46	43	52	47	44
40	53	51	46	52	47	44	54	49	45
45	55	53	48	54	49	46	56	51	47
50	57	54	50	55	51	48	57	53	49

VIBRATION(RELOCITY)LIMITES FOR SINGLE BEARING(μm/s)

d mm	V			V1			V2			V3
d mm	low band	mid band	high band	low band	mid band	high band	low band	mid band	high band	low band	mid band	high band
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	190	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