Force, Torque, and Power

For End Milling Application


Conversion of Workpiece Material Rockwell (Optional)

Skip this step if you already know the Brinell hardness number(HB)

Characteristics of Workpiece Materials

  PSI N/mm 2

End Mill Nomenclature

in. mm

Machining Conditions

sfm m/mm
in. (DOC) mm. (DOC)
in. (WOC) mm (WOC)
in. IPT (chip load) mm
What's This?
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 1.01.15 1.3
Titanium alloys 1.0 1.20 1.4
Stainless steel, High-temperature alloys 2.0 2.15 2.3
What's This?
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
What's This?
Direct Belt Drive .9
Back Gear Drive .75
Geared Head Drive .7-.8
Oil - Hydraulic Drive .6-.9

Calculated Machining Conditions

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

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