1.250, 1.500 & 2.000 Diameter Drill Mill Twins

  • 2 Effective Center Cutting Endmills.
  • Double the feed rate when used for:
  • Milling - Ramping - Helical Interpolations - Slotting
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  • 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
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Tool Info.
1.250, 1.500 & 2.000 Dia. Drill Mill Twin
Tool # D L L-1 B S (Milling) Insert (Drilling) Screw Wrench
DMT-1250 1.250 4.000 1.750 .465 1.000 (1) SPEB-432PA or (1) SPEB-432CB 638T T-15
XDMT-1250 1.250 5.000 2.750 .465 1.250 (1) SPEB-532PA (1) SPEB-532CB 838T T-20
DMT-1500 1.500 4.250 2.000 .465 1.000 (1) SPEB-432PA or (1) SPEB-432CB 638T T-15
XDMT-1500 1.500 5.250 3.000 .465 1.250 (1) SPEB-6352PA (1) SPEB-6352CB 1012T T-25
DMT-2000 2.000 4.750 2.500 .715 1.250 (1) SPEB-6352PA or (1) SPEB-6352CB 1012T T-25
XDMT-2000 2.000 6.250 4.000 .715 1.250 (1) SPEB-842PA (1) SPEB-842CB 1412T T-532

Insert Info. 

K-Tool, Inc.  Positive Top Insert Illustration
Positive Top Insert Info.
1.250, 1.500 & 2.000 Dia. Drill Mill Twin
(Milling)
Insert # I.C. T R Grades
SPEB-432PA .500 .187 .031 C55 / X33
SPEB-532PA .625 .187 .031 C55 / X33
SPEB-6352PA .750 .220 .031 C55 / X33
SPEB-842PA 1.000 .250 .031 X33
SPEB / SDEB - Chipbreaker Illustration.png
Chipbreaker Insert Info.
1.250, 1.500 & 2.000 Dia. Drill Mill Twin
(Drilling or C-Boring)
Insert # I.C. T R Grades
SPEB-432CB .500 .187 .031 X33 / X40
SPEB-532CB .625 .187 .031 X33 / X40
SPEB-6352CB .750 .220 .031 X33 / X40
SPEB-842CB 1.000 .250 .031 X33 / X40

Technical Info

Speed and Feed Info.
1.250, 1.500 & 2.000 Dia. Drill Mill Twin
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
1.250, 1.500 & 2.000 Dia. Drill Mill Twin
Material Material Examples Preferred Grade
Mild & 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
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