Efforts de coupe KM

Efforts de coupe, couple et puissance pour le tournage

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)

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

Hardness HRB OR HRC into Brinell Hardness (HB)

Rockwell HRCRockwell HRB

KM Input KM size

f Distance from the centerline to the nose radius of the insert

in mm

l₁ Distance from the flange face to the nose radius of the insert

in mm

Characteristics of Workpiece Materials

D_m Diameter

in mm

HB Brinell Hardness

p Power Constant

"p" Values (hp/ln.³/min ) for machining conditions.

Workpiece			"p" Values (hp/in.³/min) for machining conditions:			"p" Values (kW/cm³/min) for machining conditions:
Type of material	Designation	Brinell Hardness	Finishing	Roughing	General	Finishing	Roughing	General
Carbon steel	AISI 1018	125-175	0.70	0.66	0.62	0.0319	0.0301	0.0282
Carbon steel	AISI 1045	175-225	0.74	0.70	0.72	0.0337	0.0319	0.0328
Alloy steel	AISI 4140	175-225	0.79	0.74	0.73	0.0360	0.0337	0.0333
Alloy steel	AISI 4340	200-225	0.76	0.72	0.73	0.0346	0.0328	0.0333
Alloy steel	AISI 4140	225-275	0.85	0.77	0.79	0.0387	0.0351	0.0360
Alloy steel	AISI 4142	225-275	0.84	0.77	0.75	0.0383	0.0351	0.0342
Alloy steel	AISI 4340	450-500	1.31	1.00	1.05	0.0597	0.0456	0.0478
Tool steel	AISI H11	200-225	0.78	0.73	0.76	0.0355	0.0333	0.0346
	AISI 316L	125-150	0.81	0.71	0.73	0.0369	0.0323	0.0333
	AISI 410	200-250	0.83	0.73	0.75	0.0378	0.0333	0.0342
	AISI 17-4 PH	275-325	0.99	0.76	0.80	0.0451	0.0346	0.0364
Gray cast iron	SAE G3000	180-200	0.53	0.48	0.47	0.0241	0.0219	0.0214
Ductile cast iron	ASTM 65-45-12	150-175	0.58	0.55	0.51	0.0264	0.0251	0.0232
Titanium alloy	AMS Ti-6Al-4V	275-300	0.64	0.62	0.62	0.0292	0.0282	0.0282
Nickel alloy	Inconel 718	275-300	1.20	1.01	1.02	0.0547	0.0460	0.0465
Aluminum alloy	AMS 2024	120-140 (500 Kg load)	0.31	0.29	0.30	0.0141	0.0132	0.0137

hp/ln.³/min. kW/cm³/min

Machining Conditions

a_p Depth of cut

inmm

l_m Length of cut

inmm

f_n Feed rate

ipr.mm/rev

V_c Cutting speed

sfm.m/min

E Machine tool efficiency factor

Type of Drive	E_f, %
Direct Drive	95
Direct Belt Drive	90
Back Gear Drive	75
Geared Head Drive	70-80
Oil - Hydraulic Drive	60-90

Calculated Machining Conditions

n Spindle speed

rpm1/min

Q_z Metal removal rate

ln.3/min.cm³/min

t_c Cutting time

min

Safe Operating Conditions

C_L Empirical coefficient for load

F_max Maximum permissible load

lbfN

C_T Empirical coefficient for torque

T_tmax Maximum permissible torque

ft-lbs.N-m

T_p Maximum permissible bending moment

ft-lbs.N-m

Cutting Forces

F_t Tangential force

lb should not exceed F_{t max}N

F_f Feed force

lbN

F_r Radial force

lbN

R Resultant force

lbN

T Torque

ft. lbs. should not exceed T_pN-m

T_b Bending moment

ft. lbs.N-m

HPc Horsepower at the cutting tool

hpKW

P_m Horsepower at the motor

hpKW

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Efforts de coupe KM

Efforts de coupe, couple et puissance pour le tournage

Conversion of Workpiece Material Rockwell (Optional)

Characteristics of Workpiece Materials

Machining Conditions

Calculated Machining Conditions

Safe Operating Conditions

Cutting Forces

Suggestions de produit

Product Family suggestions

Notifications

Efforts de coupe KM

Efforts de coupe, couple et puissance pour le tournage

Conversion of Workpiece Material Rockwell (Optional)

Characteristics of Workpiece Materials

Machining Conditions

Calculated Machining Conditions

Safe Operating Conditions

Cutting Forces

The following files are available