Particularly robust and strong due to strengthened core.
Ground flutes, with high concentricity.
Bright finish flutes, nitrided lands.
With point geometry shape C up to 3.9 mm; shape S (special) from 4 mm.
Advantage:
Ideal for drilling shallow holes (approx. 2 - 4×D) on NC machines and automatic machines.
Recommendation:
Maximum drilling depth:
L2 = LC - 1.5 × DC.
Through-coolant: no
Standard: DIN 1897
Tolerance nominal ?: h8
Point angle: 135 degrees
Shank: Plain shank
Number of cutting edges Z: 2
recommended maximum drilling depth L2: 4.5 mm
Flute length Lc: 6 mm
Overall length L: 26 mm
Shank ? Ds: 1 mm
Feed f in steel < 750 N/mm2: 0.03 mm/rev.