
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.
| Type | Diameter range (mm) | Hole depth (L/D) | Remark |
| Short type (MAK Type) | ø9,5~ø40,5 | ~ 3 | First choice general |
| Long type (LAK Type) | ø9,5~ø40,5 | ~ 5 | purpose drill |
| Extra long type (DAK Type) | ø9,5~ø40,5 | ~ 7 | Helix angle: 25° ---> 0° |
Performance High efficiency drilling Optimized drill geometry Comparison of cutting power
| l | l | l | ||
| (chip removal capability) | ||||
| Comparison of coating damage | Comparison of damage to drill margin |
when high speed drilling After 40 min. cut length KDS…AK
TiAlN coated TiN coated KDS…AK Competitor’s drill
KDS…AK 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 mm | Drill dia.: 18,0 mm | v = 50 m/min | Drill dia.: 18,0 mm | v = 50 m/min |
| c | c | |||
| Work material: C50 (HB230) f = 0,3 mm/rev | Work material: C50 (HB230) f = 0,25 mm/rev | Work material: C50 (HB230) f = 0,3 mm/rev | ||
| doc = 50 mm | d oc = 38 mm | doc = 90 mm (L/D=5) |
Application Workpiece material Automotive parts Automotive parts
l l l
| examples | Work material: C50 (HB250) | Work material: 42CrMo4 (HB250) | |
| - General steel and alloy steel | |||
| - Low carbon steel |
| - Die steel | KDS …AK | KDS …AK |
| - Stainless steel | ||
| Concurrent A | Competitor B | |
| - Ductile cast iron |
| - Grey cast iron | lll | lll | |
| 0 100 200 300 | 0 100 200 300 | ||
| 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/rev | Conditions: v = 60 m/min, f = 0,25 mm/rev | ||
| d | = 70 mm d | = 65 mm |