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    KM Cutting Forces

    Cutting Forces, Torque, and Horsepower for Turning Applications

    These calculations are based upon theoretical values and are only intended for planning purposes. Actual results will vary. No responsibility from Kennametal is assumed.

    Conversion of Workpiece Material Rockwell (Optional)
    Metric
    Inch

    Conversion of Workpiece Material Rockwell (Optional)

    Skip this step if you already know the Brinell hardness number(HB)
    in mm
    in mm
    Characteristics of Workpiece Materials

    Characteristics of Workpiece Materials

    in mm
    HB
    "p" Values (hp/ln.3/min ) for machining conditions.
    Workpiece"p" Values (hp/in.3/min) for machining conditions:"p" Values (kW/cm3/min) for machining conditions:
    Type of materialDesignationBrinell HardnessFinishingRoughingGeneralFinishingRoughingGeneral
    Carbon steelAISI 1018125-1750.700.660.620.03190.03010.0282
    Carbon steelAISI 1045175-2250.740.700.720.03370.03190.0328
    Alloy steelAISI 4140175-2250.790.740.730.03600.03370.0333
    Alloy steelAISI 4340200-2250.760.720.730.03460.03280.0333
    Alloy steelAISI 4140225-2750.850.770.790.03870.03510.0360
    Alloy steelAISI 4142225-2750.840.770.750.03830.03510.0342
    Alloy steelAISI 4340450-5001.311.001.050.05970.04560.0478
    Tool steelAISI H11200-2250.780.730.760.03550.03330.0346
    AISI 316L125-1500.810.710.730.03690.03230.0333
    AISI 410200-2500.830.730.750.03780.03330.0342
    AISI 17-4 PH275-3250.990.760.800.04510.03460.0364
    Gray cast ironSAE G3000180-2000.530.480.470.02410.02190.0214
    Ductile cast ironASTM 65-45-12150-1750.580.550.510.02640.02510.0232
    Titanium alloyAMS Ti-6Al-4V275-3000.640.620.620.02920.02820.0282
    Nickel alloyInconel 718275-3001.201.011.020.05470.04600.0465
    Aluminum alloyAMS 2024120-140 (500 Kg load)0.310.290.300.01410.01320.0137
    hp/ln.3/min. kW/cm3/min
    Machining Conditions

    Machining Conditions

    inmm
    inmm
    ipr.mm/rev
    sfm.m/min
    Type of DriveEf, %
    Direct Drive95
    Direct Belt Drive90
    Back Gear Drive75
    Geared Head Drive70-80
    Oil - Hydraulic Drive60-90
    Calculated Machining Conditions

    Calculated Machining Conditions

    rpm1/min
    ln.3/min.cm3/min
    min
    Safe Operating Conditions

    Safe Operating Conditions

    lbfN
    ft-lbs.N-m
    ft-lbs.N-m
    Cutting Forces

    Cutting Forces

    lb should not exceed Ft maxN
    lbN
    lbN
    lbN
    ft. lbs. should not exceed TpN-m
    ft. lbs.N-m
    hpKW
    hpKW
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