.750 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.
    .750 Drill Mill Twin
    Tool # D L L-1 B S (Milling) Inserts (Drilling) Screw Wrench
    DMT-750 .750 3.000 1.000 .215 .750 (1) SPEB-322P
    &
    (1) SPEB-222P     		or (1) SPEB-322CB
    &
    (1) SPEB-222CB     		414T

    314T    		 T-10

    T-8
    XDMT-750 .750 4.250 1.500 .215 .750

    Insert Info.

    K-Tool, Inc. Positive Top Insert Illustration
    Positive Top Insert Info.
    .750 Dia. Drill Mill Twin
    (Milling)
    Insert # I.C. T R Grades
    SPEB-222P .250 .125 .031 B1M / D66 / K11 / X40
    SPEB-322P .375 .125 .031 B1M / D66 / K11 / X40
    SPEB / SDEB - Chipbreaker Illustration.png
    Chipbreaker Insert Info.
    .750 Drill Mill Twin
    (Drilling or C-Boring)
    Insert # I.C. T R Grades
    SPEB-222CB .250 .125 .031 K11 / X40
    SPEB-322CB .375 .125 .031 K11 / X40

    Technical Info

    Speed and Feed Info.
    .750 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
    .750 Dia. Drill Mill Twin
    Material Material Examples Preferred Grade
    Mild & Low Carbon Steels 1018, 1020, 1117, 1141, 12L14 K11
    High Carbon & Alloy Steels 1045, 4140, 4340, 52100, 8620 K11
    Lower Carbon Tool Steels P-20, H-13, S-7 K11
    Tool Steels A-2, A-6, D-2, M-2 K11
    Stainless Steels 303, 304, 316, 420, 15-5PH, 17-4PH K11
    Iron Cast, Nodular D66 / K11
    Iron Ductile K11
    Nickel & Titanium Alloys Inconel, Hastelloy, TI-6AL-4V K11
    Non-Ferrous Metals Aluminum, Bronze, Brass B1M / X40 / K11
    Insert Grade Description
    Grade Description
    K11 Universal High Performance Dense Coating
    D66 Multi-Layer Dense Coating
    B1M Uncoated Carbide - No Hone
    X40 Extremely Smooth Boride Coating / Periphery Ground
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