ceramic ball silicon nitride ball si3n4 ball zirconia ball zro2 ball silicon carbide ball sic ball aluminum oxide ball al2o3 ball
ceramic roller silicon nitride roller si3n4 roller zirconia roller zro2 roller
ceramic bearing silicon nitride bearing si3n4 bearing zirconia bearing zro2 bearing silicon carbide bearing sic ball aluminum oxide bearing al2o3 bearing full ceramic bearing ceramic ball bearing ceramic roller bearing
hybrid ceramic bearing hybrid ceramic ball bearing hybrid ball bearing hybrid roller bearing ceramic hybrid bearing ceramic hybrid ball bearing
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Home > Engineering Data > Standard Tolerance IT Grades

Standard Tolerance IT Grades

Basic size (mm)
Standard tolerance grades (IT)
1
2
3
4
5
6
7
8
9
10
11
12
13
14 1)
15 1)
16 1)
17 1)
18 1)
over
up to
Tolerances (米m)
Tolerances (mm)
每
3
0.8
1.2
2
3
4
6
10
14
25
40
60
0.1
0.14
0.26
0.4
0.6
1
1.4
3
6
1
1.5
2.5
4
5
8
12
18
30
48
75
0.12
0.18
0.3
0.48
0.75
1.2
1.8
6
10
1
1.5
2.5
4
6
9
15
22
36
58
90
0.15
0.22
0.36
0.58
0.9
1.5
2.2
10
18
1.2
2
3
5
8
11
18
27
43
70
110
0.18
0.27
0.43
0.7
1.1
1.8
2.7
18
30
1.5
2.5
4
6
9
13
21
33
52
84
130
0.21
0.33
0.52
0.84
1.3
2.1
3.3
30
50
1.5
2.5
4
7
11
16
25
39
62
100
160
0.25
0.39
0.62
1
1.6
2.5
3.9
50
80
2
3
5
8
13
19
30
46
74
120
190
0.3
0.46
0.74
1.2
1.9
3
4.6
80
120
2.5
4
6
10
15
22
35
54
87
140
220
0.35
0.54
0.87
1.4
2.2
3.5
5.4
120
180
3.5
5
8
12
18
25
40
63
100
160
250
0.4
0.63
1
1.6
2.5
4
6.3
180
250
4.5
7
10
14
20
29
46
72
115
185
290
0.46
0.72
1.15
1.85
2.9
4.6
7.2
250
315
6
8
12
16
23
32
52
81
130
210
320
0.52
0.81
1.3
2.1
3.2
5.2
8.1
315
400
7
9
13
18
25
36
57
89
140
230
360
0.57
0.89
1.4
2.3
3.6
5.7
8.9
400
500
8
10
15
20
27
40
63
97
155
250
400
0.63
0.97
1.55
2.5
4
6.3
9.7
500
630
每
每
每
每
每
44
70
110
175
280
440
0.7
1.1
1.75
2.8
4.4
7
11
630
800
每
每
每
每
每
50
80
125
200
320
500
0.8
1.25
2
3.2
5
8
12.5
800
1000
每
每
每
每
每
56
90
140
230
360
560
0.9
1.4
2.3
3.6
5.6
9
14
1000
1250
每
每
每
每
每
66
105
165
260
420
660
1.05
1.65
2.6
4.2
6.6
10.5
16.5
1250
1600
每
每
每
每
每
78
125
195
310
500
780
1.25
1.95
3.1
5
7.8
12.5
19.5
1600
2000
每
每
每
每
每
92
150
230
370
600
920
1.5
2.3
3.7
6
9.2
15
23
2000
2500
每
每
每
每
每
110
175
280
440
700
1100
1.75
2.8
4.4
7
11
17.5
28
2500
3150
每
每
每
每
每
135
210
330
540
860
1350
2.1
3.3
5.4
8.6
13.5
21
33

Note 1) Standard tolerance grades IT 14 to IT 18 (incl.) shall not be used for basic sizes less than or equal to 1 mm.

 

 
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