.625 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.
.625 Drill Mill Twin
Tool # D L L-1 B S (Milling) Inserts (Drilling) Screw Wrench
DMT-625 .625 3.000 1.000 .215 .750 (1) SDEB-2522P
&
(1) SPEB-222P
or (1) SDEB-2522CB
&
(1) SPEB-222CB
300T T-8
XDMT-625 .625 4.000 1.250 .215 .750

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Positive Top Insert Info.
.625 Dia. Drill Mill Twin
(Milling)
Insert # I.C. T R Grades
SPEB-222P .250 .125 .031 K11
SDEB-2522P .312 .125 .031 X33
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Chipbreaker Insert Info.
.625 Drill Mill Twin
(Drilling or C-Boring)
Insert # I.C. T R Grades
SPEB-222CB .250 .125 .031 K11 / X40
SDEB-2522CB .312 .125 .031 K11 / X40

Speed and Feed Info.
.625 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
.625 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 X40 / K11 or X33
Insert Grade Description
Grade Description
K11 Universal High Performance Dense Coating
X33 High Performance Nitride
X40 Extremely Smooth Boride Coating / Periphery Ground
**X33 will be replaced with K11
as inventory runs out **
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