Milling Torque Calculator | Face Milling – Kennametal

Calculate Tangential Force, Toque, and Machining Power for Face Milling 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)

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

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
Face Mill Nomenclature

Face Mill Nomenclature

in mm
Machining Conditions

Machining Conditions

(SFM) m/min
in (DOC) mm (DOC)
in (WOC) mm (WOC)
in. (IPT) (chip load) mm
Most Common
Workpiece Materials
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
Direct Belt Drive .9
Back Gear Drive .75
Geared Head Drive .7-.8
Oil - Hydraulic Drive .6-.9
Calculated Machining Conditions

Calculated Machining Conditions

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

Calculated Required Power

lb N
Nm   in.-lb   ft-lb Nmm
Machining Power

Machining Power

(HPc) KW
hp KW
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