Bearings Noise & Vibration

Bearing Noise Is A Function Of Both The Bearing Itself And The Way In Which It Is Used.Bearings Can Be Specified As 100% Noise-tested During Manufacturing When You Order.Bearing Noise Is Not Generally Influenced By ABEC Precision,But Rather By Manufacturers' Internal Quality Standards, Particularly Raceway Finish.The Vibration And Noise Of Bearings Are Classified As Four Classed As Z1,Z2,Z3 and Z4.It Is Measured By Vibration Acceleration Gauge.For Special Requirement,It Is Measured By Vibration Velocity Gauge(BVT-1) And Classified As V1, V2, V3 and V4:


•Z&V: For General Applications. Standard Deep Groove Ball Bearings In Compliance With.
•Z1&V1: For Applications Where There Are Primary Requirements For Vibration.
•Z2&V2: For 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 V V1 V2 V3 V4
mm Low Medium High Low Medium High Low Medium High Low Medium High Low Medium High
Brand Brand Brand Brand Brand Brand Brand Brand Brand Brand Brand Brand Brand Brand Brand
3,4 80 44 44 60 35 32 48 26 22 31 16 15 28 10 10
5,6 110 72 60 74 48 40 58 36 30 35 21 18 32 11 11
7,8,9 130 96 80 92 66 54 72 48 40 44 28 24 38 12 12
10,12 160 120 100 120 80 70 90 60 50 55 35 30 45 14 15
15 210 150 120 150 100 85 110 78 60 65 46 35 52 18 18
17 210 150 120 150 100 85 110 78 60 65 46 35 52 25 25
20 260 190 150 180 125 100 130 100 75 80 60 45 60 25 25
22,25 260 190 150 180 125 100 130 100 75 80 60 45 60 30 32
28 260 190 150 180 125 100 130 100 75 80 60 45 60 35 40
30,32 300 240 190 200 150 130 150 120 100 90 75 60 70 35 40
35 300 240 190 200 150 130 150 120 100 90 75 60 70 42 45
40 360 300 260 240 180 160 180 150 130 110 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
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 Diameter Series(0) Diameter Series(2) Diameter Series(3)
mm 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 37 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 48 44 41 37 52 50 45 42 38
32 50 48 44 40 51 49 45 42 38 53 51 46 43 39
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

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