Advantages of T-Drill
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- Item description for ordering code
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Inserts for T-Drill
- Use of same insert with 4 corners in peripheral and central seat helps customers rationalize stock holding
- Use of same inserts prevents operator error and simplifies indexing of insert cutting edge
- Grade: TT9030, TT8020, TT7400
- Chipformer: DG

Designation |
Dimension |
Drill
range |
Grade |
d |
t |
R |
D1 |
SPMG 050204 DG |
5.00 |
2.38 |
0.4 |
2.25 |
12.5mm- 15.0mm |
TT9030
TT8020 TT7400 |
SPMG 060204 DG |
6.00 |
2.38 |
0.4 |
2.61 |
15.5mm- 22.0mm |
SPMG 07T308 DG |
7.94 |
3.97 |
0.8 |
2.85 |
23.0mm- 29.0mm |
SPMG 090408 DG |
9.80 |
4.30 |
0.8 |
4.05 |
30.0mm- 36.0mm |
SPMG 110408DG |
11.50 |
4.80 |
0.8 |
4.45 |
37.0mm- 43.0mm |
SPMG 140512 DG |
14.30 |
5.20 |
10.2 |
5.75 |
44.0mm- 50.0mm |
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- TT9030: General purpose drilling
- TT8020: Drilling on an unstable surfaces or stacked
plates
- TT7400: Peripheral pocket only for carbon stel, alloy
steel.
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Machining Condition |
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Speed(Vc) & Feed rate(f)for materials and drill diameters |
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Material |
Vc(m/min) |
Feed(mm/rev) |
12.5- 15 |
16- 22 |
23- 29 |
30- 36 |
Low Carbon Steel
(-0.3% C) |
180-250 |
0.06-0.10 |
0.06-0.10 |
0.06-0.12 |
0.08-0.12 |
Carbon Steel
(-0.3% C-) |
160-220 |
0.08-0.15 |
0.08-0.15 |
0.10-0.18 |
0.12-0.20 |
Low Alloy Steel |
150-220 |
0.08-0.14 |
0.08-0.14 |
0.10-0.18 |
0.12-0.20 |
High Alloy Steel |
130-180 |
0.08-0.12 |
0.08-0.12 |
0.08-0.13 |
0.10-0.16 |
Stainless Steel |
170-240 |
0.06-0.10 |
0.06-0.10 |
0.06-0.12 |
0.08-0.12 |
Cast Iron |
180-250 |
0.08-0.16 |
0.08-0.16 |
0.12-0.20 |
0.15-0.23 |
Ductitle
Cast Iron |
130-200 |
0.08-0.15 |
0.08-0.15 |
0.10-0.18 |
0.12-0.20 |
Aluminum |
330-380 |
0.1-0.15 |
0.1-0.15 |
0.12-0.20 |
0.12-0.20 |
Ti Alloy
(Ti 6AI) |
30-60 |
0.03-0.05 |
0.03-0.05 |
0.03-0.05 |
0.03-0.05 |
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