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    Boring Bar Deflection

    Boring Bar Deflection, Cutting Forces, and Horsepower Requirement

    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)
    Boring Bar Dimensions

    Boring Bar Dimensions

    inmm
    If bar does not have a coolant hole use 0
    inmm
    inmm
    Boring Bar Material Properties

    Boring Bar Material Properties

    psiN/mm2
    Workpiece

    Workpiece

    inmm
    Workpiece
    Workpiece"p" Values (hp/in.3/min) for machining conditions:"p" Values (kW/cm3/min) for machining conditions:
    Type of materialDesignationCalculate HardnessFinishingRoughingGeneralFinishingRoughingGeneral
    Carbon steelAISI 10181410.700.660.620.033220.030940.02867
    Carbon steelAISI 10451950.740.700.720.034580.031400.03276
    Alloy steelAISI 41401940.790.740.730.037770.033220.03367
    Alloy steelAISI 43402140.760.720.730.038220.033220.03367
    Alloy steelAISI 41402580.850.770.790.040040.035040.03595
    Alloy steelAISI 41422770.840.770.750.040500.035040.03595
    Alloy steelAISI 43404851.311.001.050.059610.046870.04869
    Tool steelAISI H112050.780.730.760.038220.033670.03504
    Stainless steelAISI 316L1470.810.730.730.038220.031850.03322
    Stainless steelAISI 4102430.810.710.740.038680.033670.03413
    Stainless steelAISI 17-4 PH2940.990.700.720.045510.033670.03458
    Gray cast ironSAE G30001950.530.480.470.027300.021840.02184
    Ductile cast ironASTM 65-45-121650.580.550.510.030030.023660.02366
    Titanium alloyAMS Ti-6Al-4V2870.640.620.620.030940.027760.02867
    Nickel alloyInconel 7182771.201.011.021.059610.045960.04733
    Aluminum alloysAMS 20241390.310.290.300.015470.013200.01365
    hp/ln.3/min. kW/cm3/min
    Machining Conditions

    Machining Conditions

    inmm
    iprmm/rev
    sfmmm/min
    Machine Tool Efficiency Factors
    Direct Belt Drive.9
    Back Gear Drive.75
    Geared Head Drive.7-.8
    Oil - Hydraulic Drive.6-.9
    Your Results

    Your Results

    inmm4
    rpm
    in.cm3/min
     
    Dynamics of Boring

    Dynamics of Boring

    lbN
    lbN
    lbN
    inmm
     
    Horse Power Calculation

    Horse Power Calculation

    hpKW
    hpKW
    ft-lbsNmm
     
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