Threading Taps

High alloyed steels
Rm = 1.000 ÷ 1.300 N/mm²
(30÷40 HRC)		  Machine tap with spiral point, driving the chips ahead.
 Chamfer lead 4-5 threads (DIN-Form B).
 Rake angle 3º÷5º measured in the 3rd thread.


     ≤ 2 x d1Through hole

DIN 371 
DIN 376 - 374 - 5156   
COATING		    
T641A T641 TiN coating (Titanium nitride) High speed steel class E type M-42
1.3207 (EW 9 Co 10)		 Machine tap with spiral point,
driving the chips ahead
A641A A641 TiAlN coating
(Titanium Aluminium Nitride)		   Form B (with GUN-nose and
chamfer lead 3.5-5 threads)
641A 641 Bright (without Coating or
without Surface treatment)		    


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