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Toolmakers' Tolerance Chart
Tolerance Terms:
GO: Unilateral Minus Tolerance (e.g. 1.000" Class X GO tolerance would be 0.999940 - 1.000")
NO GO: Unilateral Plus Tolerance (e.g. 1.000" Class X NO GO tolerance would be 1.000 - 1.000060")
MASTER or SET: Bilateral (split) Tolerance (e.g. 1.000" Class X MASTER tolerance would be 0.999970 - 1.000030")
| GAGEMAKERS' TOLERANCE CHART |
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ENGLISH
|
|
Size Range
|
Tolerance in Inches
|
| Above |
Up to & Including
|
Class XXX |
Class XX |
Class X |
Class Y |
Class Z |
Class ZZ |
| 0.020 |
0.825 |
0.000010 |
0.000020 |
0.000040 |
0.000070 |
0.000100 |
0.000200 |
| 0.825 |
1.510 |
0.000016 |
0.000030 |
0.000060 |
0.000090 |
0.000120 |
0.000240 |
| 1.510 |
2.510 |
0.000020 |
0.000040 |
0.000080 |
0.000120 |
0.000160 |
0.000320 |
| 2.510 |
4.510 |
0.000025 |
0.000050 |
0.000100 |
0.000150 |
0.000200 |
0.000400 |
| 4.510 |
6.510 |
0.000033 |
0.000065 |
0.000130 |
0.000190 |
0.000250 |
0.000500 |
| 6.510 |
9.010 |
0.000040 |
0.000080 |
0.000160 |
0.000240 |
0.000320 |
0.000640 |
|
METRIC
|
|
Size Range
|
Tolerance in Millimeters
|
| Above |
Up to & Including
|
Class XXX |
Class XX |
Class X |
Class Y |
Class Z |
Class ZZ |
| 0.74 |
20.96 |
0.00025 |
0.00051 |
0.00102 |
0.00178 |
0.00254 |
0.00508 |
| 20.96 |
38.35 |
0.00041 |
0.00076 |
0.00152 |
0.00229 |
0.00305 |
0.00610 |
| 38.35 |
63.75 |
0.00051 |
0.00102 |
0.00203 |
0.00305 |
0.00406 |
0.00813 |
| 63.75 |
114.55 |
0.00064 |
0.00127 |
0.00254 |
0.00381 |
0.00508 |
0.01016 |
| 114.55 |
165.35 |
0.00084 |
0.00165 |
0.00330 |
0.00483 |
0.00635 |
0.01270 |
| 165.35 |
228.85 |
0.00102 |
0.00203 |
0.00406 |
0.00610 |
0.00813 |
0.01626 |
|