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Drilling tools \ Technical introduction – solid carbide / HSSE drilling

drilling tools geometries

grinding/geometry:
HPC  tip angle 140°
UNI
 2-surface grinding
 spiral angle 30°
 2 drill heels on 3xD and 5xD
 4 drill heels on 8xD and 12xD
 dia. tolerance h7 or m7
advantages:
 these geometries are specially developed for universal use
 the various coatings with cutting edge preparation prevents micro-breakouts on the blades, thereby increasing
their service life

HPC grinding/geometry:
VA  tip angle 140°
 for HPC drilling in the material groups stainless steel, titanium, nickel and special alloys
 2-surface grinding
 spiral angle 30°
 2 drill heels
 dia. tolerance h7

advantages:
 specially developed geometry for machining stainless steel, titanium, nickel alloys and special alloys
 Ultra M coating with cutting edge preparation prevents micro-breakouts on the blades, thereby increasing the
service life

grinding/geometry:
HPC  for HPC drilling in non-ferrous metals
ALU
 tip angle 135°
 spiral angle 15°
 6 drill heels
 dia. tolerance h7
advantages:
 specialised use with long service life in non-ferrous metals such as aluminium, brass, bronze and cast iron
 6 drill heels ensure even at very high cutting speeds for a drilling accuracy
 latest ALU-CC coating technology with superior form-fi tting properties of the blade ensures sharp cutting edges
and excellent sliding behaviour as well as optimum chip removal even at high cutting speeds

grinding/geometry:
Typ
U4  tip angle: 118°
 spiral angle: 38°
 precision-ground 4-surface grinding
 optimised point thinning similar to cross grinding
 straight main cutter

cutting material:
 HSSE: HSS steel with 5% cobalt alloy with greater hot hardness for increased loads
advantages:
 suitable for a wide range of applications thanks to the universal geometry design
 high level of process reliability through precision grinding
 extremely good centring properties thanks to the 4-surface grinding with point thinning results similar to cross-
grinding (no centring required)
 low process forces (feeding force and torque) through optimised fl ute profi le
 extremely precise, dimensionally accurate drilling in terms of the diameter and the roundness through smooth
geometry design

Source: Hahn+Kolb Werkzeuge GmbH
Technical data subject to change. www.iconridge.com
Availability subject to country specific rules and regulations. 10

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