Check the item you want to calculate, input values in the two boxes, and then press the Calculate button.
DC(inch)
n(min^-1)
vc(SFM)

（Problem）
What is the cutting speed when main axis spindle speed is 350min^-1 and the cutter diameter is ø5" ?
（Answer）
Substitute π=3.14, DC=5", n=350 into the formulae.
vc=π×DC×n÷12=3.14×5"×350÷12=457.9SFM
The cutting speed is 457.9SFM.

Check the item you want to calculate, input values in the three boxes, and then press the Calculate button.
vf(IPM)
z
n(min^-1)
fz(IPT)

（Problem）
What is the feed per tooth when the main axis spindle speed is 500min^-1, number of insert is 10, and table feed is 20inch/min?
（Answer)
Substitute the above figures into the formulae.
fz=Vf÷(z×n)=20÷(10×500)=.004IPT
The answer is .004IPT.

vf(IPM): Table Feed per Min.
z:Insert Number
n(min^-1): Main Axis Spindle Speed
fz(IPT):Feed per Tooth

（Problem）
What is the table feed when feed per tooth is .004IPT, number of insert is 10, and main axis spindle speed is 500min^-1?
（Answer）
Substitute the above figures into the formulae.
vf=fz×z×n=.004IPT×10×500=20inch/min
The table feed is 20inch/min.

Input the values.
L(inch)
vf(IPM)

Tc(min)
sec.

（Problem）
What is the cutting time required for finishing 4" width and 12" length surface of a cast iron (GG20) block when the cutter diameter is ø4", the number of inserts is 16, the cutting speed is 410SFM, and feed per tooth is .01. (spindle speed is 200min^-1）
（Answer）
Calculate table feed per min
vf=.01×16×200=32inch/min
Calculate total table feed length.
L=12+4=16inch
Substitute the above answers into the formula.
Tc=16÷32=0.5(min)
The answer is 30 sec.

Check the item you want to calculate, input values in the two boxes, and then press the Calculate button.
DC(mm)
n(min^-1)
vc(m/min)

（Problem）
What is the cutting speed when main axis spindle speed is 350min^-1 and the cutter diameter is ø125 ?
（Answer）
Substitute π=3.14, DC=125, n=350 into the formula.
vc=(π•DC•n)÷1000=(3.14×125×350)÷1000
=137.4m/min
The cutting speed is 137.4m/min.

Check the item you want to calculate, input values in the three boxes, and then press the Calculate button.
vf(mm/min)
z
n(min^-1)
fz(mm/t.)

（Problem）
What is the feed per tooth when the main axis spindle speed is 500min^-1, number of insert is 10, and table feed is 500mm/min?
（Answer)
Substitute the above figures into the formula.
fz=Vf÷(z×n)=500÷(10×500)=0.1mm/tooth
The answer is 0.1mm/tooth.

vf(mm/min): Table Feed per Min.
z:Insert Number
n(min^-1): Main Axis Spindle Speed
fz(mm/tooth):Feed per Tooth

（Problem）
What is the table feed when feed per tooth is 0.1mm/t., number of insert is 10, and main axis spindle speed is 500min^-1?
（Answer）
Substitute the above figures into the formula.
vf=fz×z×n=0.1×10×500=500mm/min
The table feed is 500mm/min.

Input the values.
L(mm)
vf(mm/min)

Tc(min)
sec.

（Problem）
What is the cutting time required for finishing 100mm width and 300mm length surface of a cast iron (JIS FC200) block when the cutter diameter is ø200mm, the number of inserts is 16, the cutting speed is 125m/min, and feed per tooth is 0.25mm. (spindle speed is 200min^-1）
（Answer）
Calculate table feed per min
vf=0.25×16×200=800mm/min
Calculate total table feed length.
L=300+200=500mm
Substitute the above answers into the formula.
Tc=500÷800=0.625(min)
0.625×60=37.5(sec). The answer is 37.5 sec.