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Shaft - Hole Class Grade Tolerances | Mechanical Tolerance Standards Charts
Class I | Class II | Class III | Class IV | Class V
Basic Diameter |
Hole Diameter |
Shaft Diameter |
Interference Maximum Minimum |
| .125 |
.1240 .1248 |
.1254 .1250 |
.0014 .0002 |
| .156 |
.1562 .1570 |
.1576 .1572 |
.0014 .0002 |
| .188 |
.1875 .1883 |
.1889 .1885 |
.0014 .0002 |
| .213 |
.2188 .2196 |
.2202 .2198 |
.0014 .0002 |
| .250 |
.2500 .2508 |
.2514 .2510 |
.0014 .0002 |
| .281 |
.2812 .2820 |
.2828 .2823 |
.0016 .0003 |
| .312 |
.3125 .3133 |
.3141 .3136 |
.0016 .0003 |
| .344 |
.3438 .3446 |
.3454 .3449 |
.0016 .0003 |
| .375 |
.3750 .3758 |
.3766 .3761 |
.0016 .0003 |
| .406 |
.4062 .4070 |
.4078 .4073 |
.0016 .0003 |
| .438 |
.4375 .4383 |
.4391 .4386 |
.0016 .0003 |
| .469 |
.4688 .4796 |
.4704 .4699 |
.0016 .0003 |
| .500 |
.5000 .5008 |
.5018 .5011 |
.0016 .0003 |
| .562 |
.5625 .5634 |
.5643 .5637 |
.0018 .0003 |
| .625 |
.6250 .6259 |
.6268 .6262 |
.0018 .0003 |
| .688 |
.6875 .6884 |
.6893 .6887 |
.0018 .0003 |
| .750 |
.7500 .7509 |
.7518 .7512 |
.0018 .0003 |
| .812 |
.8125 .8134 |
.8145 .8138 |
.0020 .0004 |
| .875 |
.8750 .8759 |
.8770 .8763 |
.0020 .0004 |
| .938 |
.9375 .9384 |
.9395 .9388 |
.0020 .0004 |
| 1.000 |
1.0000 1.0009 |
1.0020 1.0013 |
.0020 .0004 |
| 1.125 |
1.1250 1.1260 |
1.1273 1.1265 |
.0023 .0005 |
| 1.250 |
1.2500 1.2510 |
1.2523 1.2515 |
.0023 .0005 |
| 1.375 |
1.3750 1.3760 |
1.3773 1.3765 |
.0023 .0005 |
| 1.500 |
1.5000 1.5010 |
1.5023 1.5015 |
.0023 .0005 |
| 1.625 |
1.6250 1.6260 |
1.6275 1.6266 |
.0025 .0005 |
| 1.750 |
1.7500 1.7510 |
1.7525 1.7516 |
.0025 .0005 |
| 1.875 |
1.8750 1.8760 |
1.8775 1.8766 |
.0025 .0005 |
| 2.000 |
2.0000 2.0010 |
2.0025 2.0016 |
.0025 .0005 |
| 2.250 |
2.2500 2.2511 |
2.2528 2.2518 |
.0028 .0007 |
| 2.500 |
2.5000 2.5011 |
2.5028 2.5018 |
.0028 .0007 |
| 2.750 |
2.7500 2.7511 |
2.7531 2.7520 |
.0031 .0009 |
| 3.000 |
3.0000 3.0011 |
3.0031 3.0020 |
.0031 .0009 |
| 3.250 |
3.2500 3.2512 |
3.2535 3.2523 |
.0035 .0011 |
| 3.500 |
3.500 3.5012 |
3.5035 3.5023 |
.0035 .0011 |
| 3.750 |
3.7500 3.7512 |
3.7535 3.7523 |
.0035 .0011 |
| 4.000 |
4.0000 4.0012 |
4.0035 4.0023 |
.0035 .0011 |
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