Boring Bar Deflection, Cutting Forces, and Power Requirements

 

Conversion of Workpiece Material Rockwell (Optional)

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

Boring Bar Dimensions

in mm
in mm What's This?

If bar does not have a coolant hole use 0

in mm
 

Boring Bar Material Properties

psi N/mm2
 

Workpiece

in mm
hp/in.3/min. kW/cm3/min What's This?
"p" Values (hp/ln.3/min) for machining conditions.
Type of material Designation Hardness Finishing Roughing General
Carbon steel AISI 1018 141 0.70 0.66 0.62
Carbon steel AISI 1045 195 0.74 0.70 0.72
Alloy steel AISI 4140 194 0.79 0.74 0.73
Alloy steel AISI 4340 214 0.76 0.72 0.73
Alloy steel AISI 4140 258 0.85 0.77 0.79
Alloy steel AISI 4142 277 0.84 0.77 0.75
Alloy steel AISI 4340 485 1.31 1.00 1.05
Tool steel AISI H11 205 0.78 0.73 0.76
Stainless steel AISI 316L 147 0.81 0.73 0.73
Stainless steel AISI 410 243 0.81 0.71 0.74
Stainless steel AISI 17-4 PH 294 0.99 0.70 0.72
Gray cast iron SAE G3000 195 0.53 0.48 0.47
Ductile cast iron ASTM 65-45-12 165 0.58 0.55 0.51
Titanium alloy AMS Ti-6Al-4V 287 0.64 0.62 0.62
Nickel alloy Inconel 718 277 1.20 1.01 1.02
Aluminum alloy AMS 2024 139 0.31 0.29 0.30
 

Machining Conditions

in mm
ipr mm/rev
sfm mm/min
What's This?
Machine Tool Efficiency Factors
Direct Belt Drive .9
Back Gear Drive .75
Geared Head Drive .7-.8
Oil - Hydraulic Drive .6-.9
 

Your Results

in mm 4
rpm
in. cm 3/min
 

Dynamics of Boring

lb N
lb N
lb N
in mm
 

Horsepower Calculation

hp KW
hp KW
ft-lbs Nmm
 

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