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• Accuracy: +/- 0,05 mm
• Hole tolerance non-metallic: +/- 0,1 mm
• Hole tolerance metallic (every diameter) + 0,10 / - 0,05 mm
• Holes of diameter higher than 6 mm are being milld
If there are non-metallic holes in designs you should clearly signify them in a file or attach separate
description to the technological card, for example:
| Tool |
Description |
| T04 | non-metalic (NPTH) |
| T05 | metalic (PTH) |
| or |
| hole diameter |
description |
| 0,5 mm | non-metalic (NPTH) |
| 0,6 mm | metalic (PTH) |
|
In case of absence of such hole description, we go along this principles:
• absence of pad under the hole - making non-metallic hole NPTH
• pad <= hole - making non-metallic hole NPTH
• pad > hole - making metallic hole PTH
All pads and mass under the holes non-metallic will be deleted
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