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Tolerances for New Gauge Blocks
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Metric
| Nominal Length ln mm |
Calibration grade K | Grade 0 | Grade 1 | Grade 2 | |||||
| Greater than | Less than or equal to | limit deviation of length at any point from nominal length ± te µm |
tolerance for the variation in length tv µm |
limit deviation of length at any point from nominal length ± te µm |
tolerance for the variation in length tv µm |
limit deviation of length at any point from nominal length ± te µm |
tolerance for the variation in length tv µm |
limit deviation of length at any point from nominal length ± te µm |
tolerance for the variation in length tv µm |
| 0,5 | 10 | 0,2 | 0,05 | 0,12 | 0,1 | 0,2 | 0,16 | 0,45 | 0,3 |
| 10 | 25 | 0,3 | 0,05 | 0,14 | 0,1 | 0,3 | 0,16 | 0,6 | 0,3 |
| 25 | 50 | 0,4 | 0,06 | 0,2 | 0,1 | 0,4 | 0,18 | 0,8 | 0,3 |
| 50 | 75 | 0,5 | 0,06 | 0,25 | 0,12 | 0,5 | 0,18 | 1 | 0,35 |
| 75 | 100 | 0,6 | 0,07 | 0,3 | 0,12 | 0,6 | 0,2 | 1,2 | 0,35 |
This specification does cover larger gauges but we only manufacture up to 100mm
| Flatness tolerance tf | |||||
| Nominal length, ln mm |
Flatness tolerance, tf µm |
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| Grade | |||||
| Greater than | Less than or equal to | K | 0 | 1 | 2 |
| 0,5 | 150 | 0,05 | 0,10 | 0,15 | 0,25 |
Imperial
The above specification using the relationship 1inch = 25.4mm exactly deriving equivalent inch tolerance, rounded with microinch resolution.