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Threading Taps |
 Wrought aluminium alloys Si = 6÷10 %(long-chipping) |
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DIN 371  AC134A 134A DL134A |
DIN 376 - 374 - 5156  AC134 134 DL134 |
COATING    |
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 ≤ 2 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 14º÷16º measured in the 3rd thread. |
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