.500 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
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Tool Info.
.500 Dia. Drill Mill Twin
Tool # D L L-1 B S Inserts Screw Wrench
DMT-500 .500 2.625 .625 .170 .500 (1) SDEB-1511CB
(1) SDEB-2151CB		 164T
300T		 T-6
T-8
XDMT-500 .500 3.500 1.000 .170 .500 (1) SDEB-1511CB
(1) SDEB-2151CB		 164T
300T		 T-6
T-8

Insert Info.

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Insert Info.
.500 Dia. Drill Mill Twin
Insert # I.C. T R Grades
SDEB-1511CB .187 .082 .015 X33 / X40
SDEB-2151CB .250 .093 .015 K11 / K22

Technical Data

Speed and Feed Info.
.500 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 .0015 - .003 .004 - .006
High Carbon & Alloy Steel
Ex. 1045, 4140, 4340, 52100, 8620		 500 - 800 .0015 - .002 .004 - .006
Lower Carbon Tool
Ex. P-20, H-13, S-7		 400 - 700 .0015 - .002 .004 - .006
Tool Steel
Ex. A-2, A-6, D-2, M-2		 300 - 600 .0015 - .002 .004 - .006
Stainless Steel
Ex. 304, 316, 420, 15-5PH, 17-4PH		 300 - 600 .0015 - .002 .004 - .006
Iron
Ex. Cast, Ductile, Nodular		 600 - 1000 .0015 - .004 .004 - .007
Nickel & Titanium Alloy
Ex. Inconel, Hastelloy, TI-6AL-4V		 120 - 180 .0015 - .002 .002 - .004
Non-Ferrous Metal
Ex. Aluminum, Bronze, Brass		 1000 - 2500 .0015 - .004 .004 - .007
Insert Grade Selection
.500 Dia. Drill Mill Twin
Material Material Examples Preferred Grade
Mild & Low Carbon Steels 1018, 1020, 1117, 1141, 12L14 K11 or X33
High Carbon & Alloy Steels 1045, 4140, 4340, 52100, 8620 K11 or X33
Lower Carbon Tool Steels P-20, H-13, S-7 K11 or X33
Tool Steels A-2, A-6, D-2, M-2 K11 or X33
Stainless Steels 303, 304, 316, 420, 15-5PH, 17-4PH K11 or X33
Iron Cast, Nodular K11 or X33
Iron Ductile K11 or X33
Nickel & Titanium Alloys Inconel, Hastelloy, TI-6AL-4V K11 or X33
Non-Ferrous Metals Aluminum, Bronze, Brass K22 or X40
Insert Grade Description
Grade Description
K11 Universal High Performance Dense Coating
X33 High Performance Nitride
K22 Ultra Smooth Dense Coating / Periphery Ground
X40 Extremely Smooth Boride Coating / Periphery Ground
**X33 will be replaced with K11
as inventory runs out **
**X40 will be replaced with K22
as inventory runs out **
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