Table 9b. American National Standard Clearance Locational Fits ANSI/ASME B4.1-1967 (2009; out of print)
Class LC 6
Class LC 7
Class LC 8
Class LC 9
Class LC 10
Class LC 11
Std. Tolerance Limits
Std. Tolerance Limits
Std. Tolerance Limits
Std. Tolerance Limits
Std. Tolerance Limits
Std. Tolerance Limits
Nominal Size Range, Inches
Clear- ance a
Hole H9
Shaft f8
Clear- ance a
Hole H10
Shaft e9
Clear- ance a
Hole H10
Shaft d9
Clear- ance a
Hole H11
Shaft c10
Clear- ance a
Hole H12
Clear- ance a
Hole H13
Shaft
Shaft
Over
To
Values shown below are in thousandths of an inch
0.3 +1.0 1.9 0 0.4 +1.2 2.3 0 0.5 +1.4 2.8 0 0.6 +1.6 3.2 0 0.8 +2.0 4.0 0 1.0 +2.5 5.1 0 1.2 +3.0 6.0 0 1.4 +3.5 7.1 0 1.6 +4.0 8.1 0 2.0 +4.5 9.3 0 2.2 +5.0
0.6 +1.6 – 0.6
1.0 2.0 1.2 4.2 1.6 5.2 2.0 6.4 2.5 8.0 3.6 9.5
+1.6 – 1.0
2.5 +2.5 6.6 0 2.8 +3.0 7.6 0 3.0 +3.5 8.7 0 3.5 +4.0
4
+4
5
+6
–0.3 –0.9 –0.4 –1.1 –0.5 –1.4 –0.6 –1.6 –0.8 –2.0 –1.0 –2.6 –1.0 –3.0 –1.4 –3.6 –1.6 –4.1 –2.0 –4.8 –2.2 –5.2 –2.5 –6.0 –2.8 –6.8
– 2.5 – 4.1 – 2.8 – 4.6 – 3.0 – 5.2 – 3.5 – 6.3 – 4.5 – 8.0 – 5.0 – 9.0 – 6.0 –10.5
– 4 – 8
– 5 – 11 – 6 –13
0 - 0.12
3.2 0
0
12
0
17
0
– 1.6
– 2.0
0.8 +1.8 – 0.8
+1.8 – 1.2
4.5 +5
6
+7
– 4.5
0.12 – 0.24
3.8 0
0
14.5
0
0
– 2.0
– 2.4
– 9.5 20
1.0 +2.2 – 1.0
+2.2 – 1.6
5
+6
7
+9
– 5 –11 – 6 –13 – 7 –15 – 8 –18 –10 –22 –11 –25 –12 –28 –16 –34 –20 –40 –22 –44 –25 –50
– 7 –16 – 8 –18 –10 –22 –12 –28 –14 –32 –16 –38 –18 –43 –22 –50 –28 –58 –30 –65 –35
0.24 – 0.40
4.6 0
0
17
0
25
0
– 2.4
– 3.0
1.2 +2.8 – 1.2
+2.8 – 2.0
6
+7
8
+10
0.40 - 0.71
5.6 0
0
10.3 0
20
0
28 10 34 12 44 14 50 16 60 18 68 22 78 28 88 30
0
– 2.8
– 3.6
1.6 +3.5 – 1.6
+3.5 – 2.5
4.5 +5.0
7
+8
+12
0.71 - 1.19
7.1 0
0
13.0 0 5.0 +6 15.0 0 6.0 +7 17.5 0
23
0
0
– 3.6
– 4.5
+4.0 – 3.0
8 +10
+16
2.0 +4.0 – 2.0
1.19 - 1.97
8.5 0
0
28
0
0
– 4.5
– 5.5
2.5 +4.5 – 2.5
4.0 11.5 5.0 13.5
+4.5 – 4.0
10 +12
+18
1.97 - 3.15
10.0 0
0
34
0
0
– 5.5
– 7.0
3.0 +5.0 – 3.0
+5.0 – 5.0
7
+9
11 +14
+22
– 7 –12 – 8 –14 –10 –17 –12 –20 –14 –23 –16 –26
3.15 - 4.73
11.5 0
0
21
0
39
0
0
– 6.5
– 8.5 – 6 –10 – 7 –11.5
3.5 +6.0 – 3.5
6
+6
8 +10
12 +16
+25
4.73 - 7.09
13.5 0
16
0
24
0
44
0
0
– 7.5
7
+7
10 +12
16 +18
+28
4.0 +7.0 – 4.0
7.09 – 9.85
15.5 0
18.5
0
29
0
52
0
0
– 8.5
4.5 +8.0 – 4.5
7
+8
12 +12
20 +20
+30
– 7 –12 – 8 –14 – 9 –15
9.85 - 12.41
10.2 0
17.5 0
20
0
32
0
60
0
0
– 9.5
2.5 +6.0
5.0 +9.0 – 5
8
+9
14 +14
22 +22
+35
12.41 - 15.75
12.0 0
20.0 0
23
0
37
0
66
0
100 35 115
0
–11
2.8 +6.0
5.0 +10.0 – 5
9
+10
16 +16
25 +25
+40
15.75- 19.69
12.8 0 –75 a Pairs of values shown represent minimum and maximum amounts of interference resulting from application of standard tolerance limits. Limits for sizes above 19.69 inches are not covered by American-British-Canadian (ABC) agreements but are given in the ANSI/ASME Standard. 21.0 0 –11 25 0 42 0 75 0 0
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