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1.Material

Chrome Steel:Chemical Composition Of Chrome Steel

Steel No. Chemical Composition(%)
C Si Mn Cr Mo P S Cu Ni
GCr15 0.95-1.05 0.15-0.35 0.25-0.45 1.40-1.65 ≤0.1 ≤0.025 ≤0.25 ≤0.25 ≤0.3

 

Stainless Steel:Chemical Composition Of Stainless Steel

Stainless Steel No. C% Cr% Si% Mn% S% P% Mo% Ni%
AISI440C 0.90-1.05 17-19 ≤0.8 ≤0.7 ≤0.03 ≤0.035 - -
AISI304 0.08(0.03) 18-20 ≤1 ≤2 ≤0.03 ≤0.035 - 8-10.5(9-13)

 

2.Bearing Precision Grade

Standard Code Precision Class
CHINA GB 0 6 5 4 2
ISO 0 6 5 4 2
ANSI ABEC1 ABEC3 ABEC5 ABEC7 ABEC9
DIN P0 P6 P5 P4 P2
JIS 0 6 5 4 2

 

3.Bearing Radial Clearance

d (mm) C2 C0 C3 C4 C5
Over Up to min max min max min max min max min max
2.5 6 0 7 2 13 8 23 - - - -
6 10 0 7 2 13 8 23 14 29 20 37
10 18 0 9 3 18 11 25 18 33 25 45
18 24 0 10 5 20 13 28 20 36 28 48
24 30 1 11 5 20 13 28 23 41 30 53
30 40 1 11 6 20 15 33 28 46 40 64
40 50 1 11 6 23 18 36 30 51 45 73
50 65 1 15 8 28 23 43 38 61 55 90

 

4. Vibration and Noise Class

Tolerance data for vibration of single bearing(Unit:um/s)

d(mm) V1 V2 V3 V4
Low Medium High Low Medium High Low Medium High Low Medium High
3, 4 60 35 32 48 26 22 31 16 15 28 10 10
5, 6 74 48 40 58 36 30 35 21 18 32 11 11
7, 8, 9 92 66 54 72 48 40 44 28 24 38 12 12
10, 12 120 80 70 90 60 50 55 35 30 45 14 15
15 150 100 85 110 78 60 65 46 35 52 18 18
17 150 100 85 110 78 60 65 46 35 52 25 25
20 180 125 100 130 100 75 80 60 45 60 25 25
22, 25 180 125 100 130 100 75 80 60 45 60 30 32
28 180 125 100 130 100 75 80 60 45 60 35 40
30, 32 200 150 130 150 120 100 90 75 60 70 35 40
35 200 150 130 150 120 100 90 75 60 70 42 45
40 240 180 160 180 150 130 110 90 80 82 50 50

 

Maximum vibration acceleration of single bearing(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