HSSE-H ( 8%Co ) High alloyed steels Rm = 1,000 - 1,300 N/mm² ( 30 - 40 HRC / 300 - 385 HB / 135,000 - 185,000 PSI )
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.
Machine tap with 25° right-hand spiral flutes. 3.5 thread chamfer lead (DIN-Form D). Rake angle 3° - 5°.
ONLY FOR TAPERED THREADS. Machine tap with with straight flutes. 2,5 thread chamfer lead (DIN-Form C). Rake angle 1° - 3°.