Cost down can be achieved by improvement of drilling operation.
COMBAT DRILL
φ 39 ～ φ 49 L ／ D ＝ 2 , 3 or 4
2D Series
3D Series
4D Series
2D,3D,4D
Pilot Drill
Insert Tip
Clamp Screw
Tip Clamp Handle
Drill Dia.
Code No.
Code No.
Code No.
ℓ ℓ 1
ℓ ℓ 1
ℓ ℓ 1
ℓ 2
φ d
- ℓ
- ℓ
- ℓ
φ d - φ D
φ d - φ D
φ d - φ D
39 40 41 42 43 44 45 46 47 48 49
ST32-COMZ39-120 -COMZ40-120 -COMZ41-120 -COMZ42-120 -COMZ43-120 -COMZ44-120 -COMZ45-120 -COMZ46-120 -COMZ47-120 -COMZ48-120 -COMZ49-120
ST32-COMZ39-160 -COMZ40-160 -COMZ41-160 -COMZ42-160 -COMZ43-160 -COMZ44-160 -COMZ45-160 -COMZ46-160 -COMZ47-160 -COMZ48-160 -COMZ49-160
ST32-COMZ39- 80 -COMZ40- 80 -COMZ41- 80 -COMZ42- 80 -COMZ43- 80 -COMZ44- 80 -COMZ45- 80 -COMZ46- 80 -COMZ47- 80 -COMZ48- 80 -COMZ49- 80
9CMT9 2 pcs
M4090 T-15
9CMD10 d 1 = φ 10
80 105
120
145
160 185 32 58
9CMT6 4 pcs
M2560
T-8
φ 50 ～ φ 80 L ／ D ＝ 2
Dimensions of φ 43mm or larger
COMBAT Z DRILL 4 insert tips are installed on the drill larger than φ 43mm for less cutting resistance.
2D Series
Pilot Drill
Insert Tip
Clamp Screw
Tip Clamp Handle
Drill Dia.
ℓ 2
φ d
Code No.
ℓ ℓ 1
- ℓ
φ d - φ D
50 51 52 53 54 55 56 57 58 59 60 65 70 75 80
ST32-COMZ50-100 -COMZ51-100 -COMZ52-100 -COMZ53-100 -COMZ54-100 -COMZ55-100 -COMZ56-110 -COMZ57-110 -COMZ58-110 -COMZ59-110 ST40-COMZ60-120
9CMT6 4 pcs
M2560 T-8
100
125
ℓ 2
ℓ 1
* 1 Dimension φ 43 ～ φ 49 ： 3.4 mm φ 50 ～ φ 80 ： 4.3 mm
ℓ
5
25
* 1
9CMD12 d 1 = φ 12
32
58
φd 1 φD
φd
9CMT7 4 pcs
110
135
M3070 T-10
Effective Length ℓ L/D ＝ 6.2
9CMT7 4 pcs 9CMT9 4 pcs
M3070
T-10
120
145
-COMZ65-120 -COMZ70-130 -COMZ75-130 -COMZ80-150
9CMD12 d 1 = φ 12
40
68
130 155
M4090 T-15
Photo. shows ST25-COMZ21-130
150 175
Insert Tip for COMBAT Z DRILL The extended drill longer than L/D=5 or with chamfering tool are available as an option. Minimum. order quantity of special drill is 2 off.
★ Two Pilot Drills, a pair of insert tips and Insert Clamp Handle are supplied as standard. ★ Please refer P.48 for Centre Through Side Lock Holder,
P.48 for Flange Through Side Lock Holder
P.121 for Oil Hole Holder for COMBAT Z Drill on M/C.
and
Insert Tip
ISO Code No.
Code No.
Grade Material
Applicable Drill
Nose Radius
φ D T
φ d
Dimensions
COMZ16 ～ 20.5 COMZ21 ～ 26 COMZ43 ～ 55 COMZ26.5 ～ 35 COMZ56 ～ 65 COMZ36 ～ 42 COMZ66 ～ 80
1.98
1.9
4.76
MPMT04T104
9CMT4
11 °
R
0.4
2.38
2.8
6.35
MPMT060204 MPMT070308
9CMT6 9CMT7
Coated （ PR1725 ）
Steel Cast Iron
φ D
φ d
3.4
7.94
3.18
86 °
0.8
T
4.4
9.525
MPMT090308
9CMT9
★ The Rhomboid insert tips are installed on the drill. Total 4 corners at 2 external and 2 internal diameters can be used. Please pay attention to install the insert into the pockets correctly. ★ The spare Insert Tips are available per a box （ 10 off ） .
COMBAT Z DRILL Economical Cutting Condition ● For Steel/Cast Iron “ 40,000 ” is the basic figure for cutting speed, and the rotation speed could be obtained by dividing above figure by the drill diameter. e.g. for φ 32mm diameter drill ： 40,000 ÷ 32 ＝ 1,250 （r/ min ） ● For Stainless Steel/Steel Plate SS41 “ 25,000 ” is the basic figure for cutting speed, and the rotation speed could be obtained by dividing above figure by the drill diameter. e.g. for φ 32mm diameter drill ： 25,000 ÷ 32 ＝ 780 （r/ min ） ● Feed Rate
★ How to install Insert Tips
★ Coolant pressure more than 0.5MPa must be supplied. ★ For Stainless Steel/Steel Plate, even the cutting speed is reduced to meet with the materials, please do not reduce the feed rate and keep it as for steel. ★ For tough materials, e.g. steel plate, please use stepped feed （ G 73 ） for breaking the swarf. ★ This drill is suitable for offset hole, or inter-merged twin bore, but not suitable for stacked plate drilling.
φ 16 ～ φ 26 0.1 ～ 0.15 0.15 ～ 0.2
φ 26.5 ～ φ 42 0.1 ～ 0.2 0.2 ～ 0.3
φ 43 ～ φ 85 0.15 ～ 0.2 0.2 ～ 0.35
Drill Dia Mild Steel Feed per rev. Cast Iron Feed per rev.
310
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