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End Milling Force, Torque, and Power Calculator – Kennametal

For End Milling Application

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)
Characteristics of Workpiece Materials

Characteristics of Workpiece Materials

HB
PSI N/mm 2
Ultimate Strength shown for generic steel. Please enter the actual value of your workpiece material if available, for better accuracy You may look up this info through websites such as www.matweb.com
End Mill Nomenclature

End Mill Nomenclature

in. mm

Machining Conditions

sfm m/min
in. (DOC) mm. (DOC)
in. (WOC) mm (WOC)
in. IPT (chip load) mm
Most Common Workpiece Materials Cm at W/D ratios
W/D < = 0.66 0.66 < W/D < 1.0 W/D = 1.0
Aluminum alloys 1.0 1.05 1.1
Carbon and alloy steels 1.0 1.15 1.3
Cast irons 1.0 1.15 1.3
Titanium alloys 1.0 1.20 1.4
Stainless steel, High-temperature alloys 2.0 2.15 2.3
Milling Depth of cut Feed per tooth Cw
Category (min-max), in. (min-max), in.  
Light 0.020-0.100 0.003-0.006 1.1
Medium 0.100-0.200 0.006-0.010 1.2
Heavy duty 0.200-0.400 0.010-0.020 1.3
Direct Belt Drive .9
Back Gear Drive .75
Geared Head Drive .7-.8
Oil - Hydraulic Drive .6-.9

Calculated Machining Conditions

RPM
IPM (no productivity formula) mm/min (no productivity formula)
in. (chip load at the cut) mm/min (chip load at the cut)
IPM (with productivity formula) mm/min (with productivity formula)
MRR cm3/min
in.2 mm2

Calculated Required Power

lb N
in.-lb Nm

Machining Power

HPc kW
hp kW
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