The vibration and noise of bearings are classified in four classes Z1,Z2,Z3, AND Z4, it is measured by the ins trument of SO910-1. For special requirement, it is measured by BVT-land classified as V1, V2, V3, and V4.
The data are shown in below tables, different vibration & noise requirement should be mentioned in order. 
Tolerance Data For Vibration Of Single Bearing

Tolerance in um/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 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

MAXIMUM VIBRATION ACCELERATION OF 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 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