Threading Taps |
Steels with good machinability Rm < 750 N/mm² (101,500 PSI), Nodular graphite, Malleable cast iron |
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DIN 371 104A T104A |
DIN 376 - 374 - 5156 104 T104 |
COATING |
≤ 3 x d1 |
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Machine tap with spiral point, driving the chips ahead. Chamfer lead 4-5 threads (DIN-Form B). Rake angle 12º÷14º measured in the 3rd thread. |
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