KM Indexable Torque and Power

For Indexable Insert End Mill with KM Quick-Change Tooling

Unit:

Conversion of Workpiece Material Rockwell (Optional)

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

Hardness HRB OR HRC into Brinell Hardness (HB)

Characteristics of Workpiece Materials

Brinell Hardness: HB

Ultimate strength: PSI N/mm 2

Note: Ultimate Strength shown for generic steel. Please enter the actual value of your workpiece material if available&#44 for better accuracy You may look up this info through websites such as www.matweb.com

End Mill Nomenclature

d1 Effective cutting diameter: in. mm.

d_KM Input KM size:

d1 Distance from the centerline to the nose radius of the insert: in. mm.

l2 Distance from the flange face to the nose radius of the insert: in. mm.

z Number of inserts:

Machining Conditions

V_c Cutting speed: sfm m/min

a_p Axial Depth of cut: in.(DOC) mm (DOC)

a_e Radial width of cut: in.(WOC) mm(WOC)

f_z Required feed per tooth: in. IPT (chip load) mm

C_m Machinability factor:

Most Common Workpiece Materials	Cm at W/D ratios:
Most Common Workpiece Materials	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&#44 High-temperature alloys	2.0	2.15	2.3

Tool wear factor:

Milling	Depth of cut	Feed per tooth	C_w
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

E Machine efficiency factor:

Direct Belt Drive	.9
Back Gear Drive	.75
Geared Head Drive	.7-.8
Oil - Hydraulic Drive	.6-.9

Calculate

Safe Operating Conditions

C_L Empirical coefficient for load:

F_max Maximum permissible load applied to KM joint: lb N

F_tmax Maximum permissible tangential force: lb N

C_T Empirical coefficient for torque:

T_max Maximum permissible torque applied to KM joint: ft lb Nm

T_p Maximum permissible actual torque: ft lb Nm

Calculated Machining Conditions

n Spindle speed: RPM

V_f Feed rate: (IPM)(no productivity formula) mm/min

Reduced feed per tooth: in (chip load at the cut) mm/min

F_p Feed rate: (IPM)(with productivity formula) mm/min

Q Metal removal rate: in.³/min MRR cm3/min³

A Cross-sectional area of chip: in.² mm²

Number of flutes in the cut:

Ratio of radial width of cut to cutting diameter:

Calculated Required Power

F_t Tangential cutting force: lbf should not exceed Ft max N

T Actual torque: ft-lb should not exceed Tp Nm

Machining Power

at the cutter: HPc kW

at the motor: 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.

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KM Indexable Torque and Power

For Indexable Insert End Mill with KM Quick-Change Tooling

Conversion of Workpiece Material Rockwell (Optional)

Characteristics of Workpiece Materials

End Mill Nomenclature

Machining Conditions

Safe Operating Conditions

Calculated Machining Conditions

Calculated Required Power

Machining Power

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COVID-19: How WIDIA is responding

KM Indexable Torque and Power

For Indexable Insert End Mill with KM Quick-Change Tooling

Conversion of Workpiece Material Rockwell (Optional)

Characteristics of Workpiece Materials

End Mill Nomenclature

Machining Conditions

Safe Operating Conditions

Calculated Machining Conditions

Calculated Required Power

Machining Power

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