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 Machine Taps
 
 


  

    High alloyed steels
    Rm = 1,000 ÷ 1,300 N/mm²
       ( 30÷40 HRC / 300÷385 HB /
        135,000÷185,000 PSI )


641A 641
A641A A641
W641A W641

   Machine tap with spiral point, driving the chips ahead.
   4-5 thread chamfer lead (DIN-Form B).
   Rake angle 3°÷5°measured in the 3rd thread.




642A 642
A642A A642
W642A W642

   Machine tap with 25° right-hand spiral flutes.
   3.5 thread chamfer lead (DIN-Form D).
   Rake angle 3°÷5°.




A645

   ONLY FOR TAPERED THREADS

   Machine tap with straight flutes.
   2.5 thread chamfer lead (DIN-Form C).
   Rake angle 1°÷3°





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