KDS Type

Description

The new AK type drill features an extra long carbide drill head, new cutting geometry, coolant holes and ultra hard TiAlN coating for reliable high productivity drilling.

Advantages l General purpose drill for steels, stainless steels, cast irons

l High productivity drilling even on deep holes up to 7 x D

l Twice the tool life of conventionally coated drills

l Self centering

l Surface finish and tolerances comparable to solid carbide

l Regrindable extra long carbide head halves drill replacement

costs

TypeDiameter range (mm)Hole depth (L/D)Remark
Short type (MAK Type)ø9,5~ø40,5~ 3First choice general
Long type (LAK Type)ø9,5~ø40,5~ 5purpose drill
Extra long type (DAK Type)ø9,5~ø40,5~ 7Helix angle: 25° ---> 0°

Series

Performance High efficiency drilling Optimized drill geometry Comparison of cutting power

lll
(chip removal capability)
Comparison of coating damageComparison of damage to drill margin

when high speed drilling After 40 min. cut length KDSAK

TiAlN coated TiN coated KDSAK Competitor’s drill

KDSAK type Chip stuck in flute

vc = 120 m/min vc = 60 m/min After 30 m cut length (600 holes) Competitor’s drill

Drill dia.: 18,0 mmDrill dia.: 18,0 mmv = 50 m/minDrill dia.: 18,0 mmv = 50 m/min
cc
Work material: C50 (HB230) f = 0,3 mm/revWork material: C50 (HB230) f = 0,25 mm/revWork material: C50 (HB230) f = 0,3 mm/rev
doc = 50 mmd oc = 38 mmdoc = 90 mm (L/D=5)

Application Workpiece material Automotive parts Automotive parts

l l l

examplesWork material: C50 (HB250)Work material: 42CrMo4 (HB250)
- General steel and alloy steel
- Low carbon steel
- Die steelKDS …AKKDS …AK
- Stainless steel
Concurrent ACompetitor B
- Ductile cast iron
- Grey cast ironllllll
0 100 200 3000 100 200 300
Tool life (Holes)Tool life (Holes)
Drill:KDS 180 LAK (ø18,0mm)Drill:KDS 250 MAK (ø25,0mm)
Conditions: v = 55 m/min, f = 0,25 mm/revConditions: v = 60 m/min, f = 0,25 mm/rev
d= 70 mm d= 65 mm