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DLTCDK650 series-center drills

DLTCDK650 series-center drills
Literal statement:

DLTCDK650 center drill realize a good combination between chip flow at drill portion and that at countersink portion. Their flutes can fully accommodate chips and work well to eject the chips.center drills have the cutting edges on both ends, and have spiral flutes.Owing to good chip ejection, such troubles become less as the tools break due to chip clogging.Considering drill strength, we have minimized the drill length. Further to compensate the weakness at connecting point between drill and countersink, the connecting point has R which radius is within the back-taper of the drill. They also have a wide line-up.
 

Features:
  • Suitable for drilling steel, stainless steel, cast iron, non-ferrous material.
  • Stub chisel,excellent self-center capability.
  • Radial point, smaller cutting resistance.
  • Lip chamfer, higher feed rate, higher efficiency.

Regular size: DLTCDK650 Fine Powder Center Drill Series
Ordering code Diameter Angle  Flute length  O.A.L.   Shank Dia.
DLTCDK650-0102 1 60° 1.5 35 4
DLTCDK650-0202 2 60° 2.5 50 5
DLTCDK650-0252 2.5 60° 3 1 60 6.3
DLTCDK650-03152 3.15 60° 3.9 70 8
DLTCDK650-0402 4 60° 5 80 10
DLTCDK650-0502 5 60° 6.3 80 12
DLTCDK650-0632 6.3 60° 80 80 16

Tool material composition:
1.Physical Properties:
A) Hardness greater than or equal to 92.8 HRA;
B) Density greater than or equal to 14.2 g/cm³;
C) TRS greater than or equal to 4200 N/mm²;
D) Free of ETA phase condition;
E) No contamination by other materials;
F) Porosity = A00 / B00 / C00 ;
G) Uniform and consistent grain size. No grain size can be   larger than specified.
H) Chromium carbide grain growth inhibitor only.
2.All the tools of production, coatings are used in Germany, Switzerland,  processing equipment;



Operation parameter:
Center drilling Operation parameter:
Workpeice material Cutting speed 
(m/min)
Feed rate (mm/rev)
D4 D6 D8 D10 D12 D14 D16 D20
Low carbon steel, 
long chip 

<125HB
130
100
60
0.12
0.15
0.18
0.14
0.17
0.20
0.16
0.20
0.26
0.18
0.24
0.30
0.20
0.26
0.32
0.24
0.30
0.35
0.28
0.34
0.40
0.32
0.38
0.45
Low carbon steel,
 short cut, 
easy cut steel

<125HB
120
100
60
0.10
0.14
0.18
0.14
0.16
0.20
0.16
0.20
0.24
0.18
0.24
0.30
0.20
0.26
0.32
0.24
0.28
0.34
0.28
0.34
0.40
0.32
0.38
0.45
High carbon steel and 
medium carbon steel

<25HRC
110
80
60
0.10
0.13
0.16
0.12
0.15
0.18
0.14
0.18
0.22
0.16
0.20
0.24
0.18
0.24
0.30
0.20
0.26
0.30
0.22
0.28
0.32
0.26
0.32
0.40
Alloy steel, tool steel
<35HRC
110
80
60
0.10
0.13
0.16
0.12
0.15
0.18
0.14
0.18
0.22
0.16
0.20
0.24
0.18
0.24
0.30
0.20
0.26
0.30
0.22
0.28
0.32
0.26
0.32
0.40
Alloy steel, tool steel
35-48HRC
100
80
60
0.10
0.12
0.16
0.12
0.14
0.18
0.14
0.16
0.20
0.16
0.20
0.24
0.18
0.24
0.30
0.20
0.26
0.30
0.22
0.28
0.32
0.26
0.32
0.40
PH and ferritic, 
martensitic steels

<35HRC
100
80
60
0.10
0.12
0.16
0.12
0.14
0.18
0.14
0.16
0.20
0.16
0.20
0.24
0.18
0.24
0.30
0.20
0.26
0.30
0.22
0.28
0.32
0.26
0.32
0.40
Gray iron<32HRC 140
120
60
0.12
0.20
0.26
0.17
0.26
0.32
0.20
0.32
0.40
0.25
0.30
0.36
0.26
0.32
0.38
0.28
0.32
0.40
0.30
0.36
0.42
0.32
0.38
0.44
Alloy iron of medium 
processing difficulty, 
nodular cast iron

<28HRC
130
105
60
0.12
0.18
0.24
0.15
0.20
0.27
0.17
0.22
0.30
0.20
0.26
0.32
0.22
0.28
0.34
0.24
0.30
0.36
0.26
0.32
0.38
0.30
0.36
0.42
Intractable high 
alloy cast iron, 
nodular cast iron

<28HRC
120
90
60
0.10
0.16
0.22
0.10
0.13
0.16
0.13
0.17
0.21
0.15
0.20
0.26
0.17
0.22
0.28
0.19
0.26
0.31
0.20
0.27
0.33
0.28
0.29
0.35
Wrought aluminum alloy
Si<12%
150
120
60
0.12
0.20
0.26
0.17
0.26
0.32
0.20
0.32
0.40
0.25
0.30
0.36
0.26
0.32
0.38
0.28
0.32
0.40
0.30
0.36
0.42
0.32
0.38
0.44
Cast aluminium alloy
Si<12%
150
120
60
0.12
0.18
0.24
0.15
0.20
0.27
0.17
0.22
0.30
0.20
0.26
0.32
0.22
0.28
0.34
0.24
0.30
0.36
0.26
0.32
0.38
0.30
0.36
0.42
Cast aluminium alloy
Si>12%
150
120
60
0.10
0.13
0.16
0.12
0.15
0.18
0.14
0.18
0.22
0.16
0.20
0.24
0.18
0.24
0.30
0.20
0.26
0.30
0.22
0.28
0.32
0.26
0.32
0.40
Copper, copper alloy
<200HB
150
120
60
0.10
0.12
0.16
0.12
0.14
0.18
0.14
0.16
0.20
0.16
0.20
0.24
0.18
0.24
0.30
0.20
0.26
0.30
0.22
0.28
0.32
0.26
0.32
0.40
Attention:
  • Make sure work piece and machine are stable and use a precision holder, use hydraulic chucks, high quality collet chucks.
  • Make sure total indicated run-out(TIR) is less than 0.02mm.
  • The recommended cutting condition is suitable for apply water soluable.
  • If the tool size is not in the table. Please refer to the table closet to the blade diameter size selection of cutting parameters, adjust cutting parameters according to actual working conditions during processing.

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