Table 8b. American National Standard Running and Sliding Fits ANSI/ASME B4.1-1967 (2009; out of print)
Class RC 5
Class RC 6
Class RC 7
Class RC 8
Class RC 9
Standard Tolerance Limits
Standard Tolerance Limits
Standard Tolerance Limits
Standard Tolerance Limits
Standard Tolerance Limits
Nominal Size Range, Inches
Clear ance a
Hole H8
Shaft e7
Clear ance a
Hole H9
Shaft e8
Clear ance a
Hole H9
Shaft d8
Clear ance a
Hole H10
Shaft c9
Clear ance a
Hole H11
Shaft
Over
To
Values shown below are in thousandths of an inch
0.6 1.6 0.8 2.0 1.0 2.5 1.2 2.9 1.6 3.6 2.0 4.6 2.5 5.5 3.0 6.6 3.5 7.6 4.0 8.6
+0.6
0.6 2.2 0.8 2.7 1.0 3.3 1.2 3.8 1.6 4.8 2.0 6.1 2.5 7.3 3.0 8.7 3.5
+1.0
1.0 2.6 1.2 3.1 1.6 3.9 2.0 4.6 2.5 5.7 3.0 7.1 4.0 8.8 5.0
+1.0
2.5 5.1 2.8 5.8 3.0 6.6 3.5 7.9
+1.6
4.0 8.1 4.5 9.0
+2.5
– 0.6 – 1.0 – 0.8 – 1.3 – 1.0 – 1.6 – 1.2 – 1.9 – 1.6 – 2.4 – 2.0 – 3.0 – 2.5 – 3.7 – 3.0 – 4.4 – 3.5 – 4.0 – 5.8 – 5.0
– 0.6 – 1.2 – 0.8 – 1.5 – 1.0 – 1.9 – 1.2 – 2.2 – 1.6 – 2.8 – 2.0 – 3.6 – 2.5 – 4.3 – 3.0 – 5.2 – 3.5 – 6.0 – 4.0 – 6.8 – 5.0 – 8.0 – 6.0 – 9.5 – 8.0 –12.0
– 1.0 – 1.6 – 1.2 – 1.9 – 1.6 – 2.5 – 2.0 – 3.0 – 2.5 – 3.7 – 3.0 – 4.6 – 4.0 – 5.8 – 5.0 – 7.2 – 6.0 – 8.5 – 7.0 – 9.8 – 8.0 –11.0 –10.0 –13.5 –12.0 –16.0
– 2.5 – 3.5 – 2.8 – 4.0 – 3.0 – 4.4 – 3.5 – 5.1 – 4.5 – 6.5 – 5.0 – 7.5 – 6.0 – 9.0 – 7.0 –10.5 – 8.0 –12.0 –10.0 –14.5 –12.0 –17.0 –14.0 –20.0 –16.0 –22.0
– 4.0 – 5.6 – 4.5 – 6.0 – 5.0 – 7.2 – 6.0 – 8.8 – 7.0 –10.5 – 8.0 –12.0 – 9.0 –13.5 –10.0 –15.0 –12.0 –18.0 –15.0 –22.0 –18.0 –26.0 –22.0 –31.0 –25.0 –35.0
0 - 0.12
0
0
0
0
0
+0.7
+1.2
+1.2
+1.8
+3.0
0.12 - 0.24
0
0
0
0
0
+0.9
+1.4
+1.4
+2.2
5.0 10.7 6.0 12.8 7.0 15.5 8.0 18.0 9.0 20.5 10.0 24.0 12.0 28.0 15.0 34.0 18.0 38.0 22.0 45.0 25.0 51.0
+3.5
0.24 - 0.40
0
0
0
0
0
+1.0
+1.6
+1.6
+2.8
+4.0
0.40 - 0.71
0
0
0
0
0
+1.2
+2.0
+2.0
4.5 10.0 5.0 11.5 6.0 13.5 7.0 15.5 8.0 18.0 10.0 21.5 12.0 25.0 14.0 29.0 16.0 32.0
+3.5
+5.0
0.71 - 1.19
0
0
0
0
0
+1.6
+2.5
+2.5
+4.0
+6.0
1.19 - 1.97
0
0
0
0
0
+1.8
+3.0
+3.0
+4.5
+7.0
1.97 - 3.15
0
0
0
0
0
+2.2
+3.5
+3.5
+5.0
+9.0
3.15 - 4.73
0
0
10.7 6.0 12.5 7.0 14.3 8.0 16.0 10.0 19.5 12.0 22.0
0
0
0
+4.0
+4.0
+6.0
+10.0
+2.5
4.73 - 7.09
0
0
0
0
0
– 5.1 10.0
4.0 11.3 5.0
+4.5
+4.5
+7.0
+12.0
+2.8
7.09 - 9.85
0
0
0
0
0
5.0 10.0 6.0 11.7 8.0 14.5
+3.0
+5.0
+5.0
+8.0
+12.0
9.85 - 12.41
0
0
0
0
0
– 7.0 13.0
+3.5
+6.0
+9.0
+14.0
6.0
+6.0
– 6.0
12.41 - 15.75
0
0
0
0
0
– 8.2 15.5
+4.0
8.0
+6.0
+6.0
+10.0
+16.0
– 8.0
15.75 - 19.69
0
0
0
0
0
–10.5 18.0
a Pairs of values shown represent minimum and maximum amounts of clearance resulting from application of standard tolerance limits. Tolerance limits in Table 8a and Table 8b are added to or subtracted from basic size (as indicated by + or – sign) to obtain maximum and minimum sizes of mating parts. All data above heavy lines are in accord with ABC agreements. Symbols H5, g4, etc., are hole and shaft designations in ABC system. Limits for sizes above 19.69 inches are also given in the ANSI/ASME Standard.
Made with FlippingBook - Share PDF online