Description

Jobber drill with cyl. shank Design: Particularly sturdy model. Profile grinding, right cutting, bright surface, nitrated bevels from Ø 2.4 mm with precision ground point as well as wide flute length with heavily rounded back edges and excellent thermal resistance. Point thinning according to DIN 1412, form A. Angle of rake larger than normal, core thickness thicker than normal and without core gradient. Application: Suitable for drilling depths above 3 x D due to bevel nitration and wide flute length. Particularly suitable for alloyed/non-alloyed steels and casting types above 800 N/mm² in strength, hot and cold work steels, roller bearing steels, high-alloy steels, tempered steels and case hardening steels.

Specifications

Beschichtung	nitriert
DIN	DIN 338
Ø h8	4,7 mm
Durchmesser	4,70 mm
F	0,063 mm/U
Stähle bis 850 N/mm²	40
Stähle bis 1000 N/mm²	20
Stähle bis 1400 N/mm²	15
Stähle bis 42 HRC	12
Rost- und säurebeständige Stähle (INOX)	18
Gusseisenwerkstoffe	30
Gesamtlänge	80 mm
Spirallänge	47 mm
Spitzenwinkel	130 °
Stähle bis 700 N/mm²	0,063 mm/U
VE	10 Stück