.875 & 1.000 Diameter Drill Mill Twins
- 2 Effective Center Cutting Endmills.
- Double the feed rate when used for:
- Milling - Ramping - Helical Interpolations - Slotting
- - Cuts a flat bottom within .001
- - Center cutting
- - Drill from solid or ramp into a part at any angle
- - Ideal for pocket milling
- - Counterboring
- - 4 cutting edges per insert
- IMPORTANT: When ordering inserts
- Order all Positive Top Inserts When Ramping or Pocket Milling
- Order all Chipbreaker Inserts When Drilling or C-Boring
| Tool Info. .875 & 1.000 Dia. Drill Mill Twin |
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| Tool # | D | L | L-1 | B | S | (Milling) | Inserts | (Drilling) | Screw | Wrench |
| DMT-875 | .875 | 3.625 | 1.375 | .280 | 1.000 | (1) SPEB-3522PA & (1) SPEB-2522P |
or | N/A
& (1) SPEB-2522CB |
614T 314T |
T-15 T-8 |
| DMT-100 | 1.000 | 3.625 | 1.375 | .340 | 1.000 | (1) SPEB-422PA & (1) SPEB-322P |
or | (1) SPEB-422CB & (1) SPEB-322CB |
638T 414T |
T-15 T-10 |
| XDMT-100 | 1.000 | 5.250 | 2.000 | .340 | 1.000 | |||||
Insert Info.
| Positive Top Insert Info. .875 & 1.000 Dia. Drill Mill Twin (Milling) |
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| Insert # | I.C. | T | R | Grades |
| SPEB-2522P | .312 | .125 | .031 | C55 / X33 / X40 |
| SPEB-322P | .375 | .125 | .031 | C55 / X33 / X40 |
| SPEB-3522P | .437 | .125 | .031 | X33 |
| SPEB-422PA | .500 | .125 | .031 | X33 |
| Chipbreaker Insert Info. .875 & 1.000 Dia. Drill Mill Twin (Drilling or C-Boring) |
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| Insert # | I.C. | T | R | Grades |
| SPEB-2522CB | .312 | .125 | .031 | X33 / X40 |
| SPEB-322CB | .375 | .125 | .031 | X33 / X40 |
| SPEB-422CB | .500 | .125 | .031 | X33 / X40 |
Technical Info
| Speed and Feed Info. .875 - 1.000 Dia. Drill Mill Twin |
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| Material | S.F.M. | Drilling I.P.R. |
Milling I.P.R. |
| Mild
& Low Carbon Steel Ex. 1018, 1020, 1117, 1141, 12L14 |
800 - 1200 | .003 - .005 | .004 - .008 |
| High
Carbon & Alloy Steel Ex. 1045, 4140, 4340, 52100, 8620 |
500 - 800 | .003 - .005 | .004 - .008 |
| Lower
Carbon Tool Steel Ex. P-20, H-13, S-7 |
400 - 700 | .003 - .005 | .004 - .008 |
| Tool
Steel Ex. A-2, A-6, D-2, M-2 |
300 - 600 | .003 - .005 | .004 - .008 |
| Stainless
Steel Ex. 304, 316, 420, 15-5PH, 17-4PH |
300 - 600 | .003 - .005 | .004 - .008 |
| Iron Ex. Cast, Ductile, Nodular |
600 - 1000 | .003 - .005 | .004 - .010 |
| Nickel
& Titanium Ex. Inconel, Hastelloy, TI-6AL-4V |
120 - 180 | .002 - .004 | .002 - .004 |
| Non-Ferrous
Metal Ex. Aluminum, Bronze, Brass |
1000 - 2500 | .003 - .005 | .004 - .010 |
| Insert Grade Selection .875 & 1.000 Dia. Drill Mill Twin |
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| Material | Material Examples | Preferred Grade |
| High & Low Carbon Steels | 1018, 1020, 1117, 1141, 12L14 | X33 |
| High Carbon & Alloy Steels | 1045, 4140, 4340, 52100, 8620 | X33 |
| Lower Carbon Tool Steels | P-20, H-13, S-7 | X33 |
| Tool Steels | A-2, A-6, D-2, M-2 | X33 |
| Stainless Steels | 303, 304, 316, 420, 15-5PH, 17-4PH | X33 |
| Iron | Cast, Nodular | C55 / X33 |
| Iron | Ductile | X33 |
| Nickel & Titanium Alloys | Inconel, Hastelloy, TI-6AL-4V | X33 |
| Non-Ferrous Metals | Aluminum, Bronze, Brass | X33 / X40 |
| Insert Grade Description | |
| Grade | Description |
| C55 | Multi-Layer Power Nitride Coating |
| X33 | High Performance Nitride Coating |
| X40 | Extremely Smooth Boride Coating |
