Ring Calibration - Orientation and Tolerances
Tolerance Terms:
GO: Unilateral Minus Tolerance (e.g. 1.000" Class X GO ring tolerance would be 0.999940 - 1.000")
NO GO: Unilateral Plus Tolerance (e.g. 1.000" Class X NO GO ring tolerance would be 1.000 - 1.000060")
MASTER or SET: Bilateral (split) Tolerance (e.g. 1.000" Class X MASTER ring tolerance would be 0.999970 - 1.000030")
| GAGEMAKERS' TOLERANCE CHART | |||||||
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ENGLISH |
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|
Size Range |
Tolerance in Inches |
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| 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 |
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|
Size Range |
Tolerance in Millimeters |
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| 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 |