.875 Diameter Drill Mill Twins

  • 2 Effective Center Cutting Endmills.
  • Double the feed rate when used for:
  • Milling - Ramping - Helical Interpolations - Slotting
DMT-875
  • - 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 Drill Mill Twin
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

SPEB-Postive top insert.png
Positive Top Insert Info.
.875 Drill Mill Twin
(Milling)
Insert # I.C. T R Grades
SPEB-2522P .312 .125 .031 K11
SPEB-3522P .437 .125 .031 K11
SPEB / SDEB - Chipbreaker Illustration.png
Positive Top Insert Info.
.875 Drill Mill Twin
(Milling)
Insert # I.C. T R Grades
SPEB-2522P .312 .125 .031 K11
SPEB-3522P .437 .125 .031 K11

Speed and Feed Info.
.875 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
Speed and Feed Info.
.875 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 Description
Grade Description
K11 Universal High Performance Dense Coating
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