S O M T A P 1 2 C A T A L O G U E
47
STRAIGHT
SHANK
DRILLS
Drill Terminology
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DRILL POINT STYLES
118°
130°
130°
118°
70°
Standard Point
Split Point
Din 1412 Form C
“UX Point”
DIN 1412 TYPE B
Cast Iron Point
“DX Point”
DIN 1412 TYPE D
Benefits of the Parabolic Flute Form
Heavy web construction increases rigidity under torsional load thus eliminating chatter at the cutting edges
which cause edge break down and early failure. The Parabolic drill web is 50-90% thicker than the standard
drill, depending on drill diameter.
Wider flute form, together with quicker spiral, promotes better chip removal while allowing easier coolant flow
to the drill point.
FLUTE FORMS
z
Conventional Web
z
Parabolic Flute Form
z
Thicker Web
z
Chipbreaker
DIN 1412 TYPE A
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