## Cutting Speed (vc)

Check the item you want to calculate, input values in the two boxes, and then press the Calculate button. ※Divide by 1000 to change to m from mm.
vc (m/min) : Cutting Speed
Dm (mm) : Workpiece Diameter
π (3.14) : Pi
n (min-1) : Main Axis Spindle Speed

n(min-1)
Dm(mm)
vc(m/min)

### Problem What is the cutting speed when main axis spindle speed is 700min-1and external diameter is Φ50 ?

Substitute π=3.14, Dm=50, n=700 into the formula.
vc=(π×Dm×n)÷1000=(3.14×50×700)÷1000
=110(m/min)

Cutting speed is 110m/min.

## Feed (f)

Check the item you want to calculate, input values in the two boxes, and then press the Calculate button. f (mm/rev) : Feed per Revolution
I (mm/min) : Cutting Length per Min.
n (min-1) : Main Axis Spindle Speed

l(mm/min)
n(min-1)
f(mm/rev)

### Problem What is the feed per revolution when main axis spindle speed is 500min-1 and cutting length per minute is 120mm/min ?

Substitute n=500, I=120 into the formula.
f=l÷n=120÷500=0.24(mm/rev)

## Cutting time (Tc)

Input the values. Tc(min):Cutting Time
lm(mm):Workpiece Length
ｌ(mm/min):Cutting Length per Min.

lm(mm)
l(mm/min)
Tc(min)

### Problem

What is the cutting time when 100mm workpiece is machined at 1000min-1 with feed = 0.2mm/rev ?

First, calculate the cutting length per min. from the feed and spindle speed.
l=f×n=0.2×1000=200(mm/min)
Substitute the answer above into the formula.
Tc=lm÷l=100÷200=0.5(min)

## Theoretical finished surface roughness (h)

Input the values. h (µm):Finished Surface Roughness
f (mm/rev):Feed per Revolution

f(mm/rev)
RE(mm)
h(μm）

### Problem What is the theoretical finished surface roughness when the insert corner radius is 0.8mm and feed is 0.2mm/rev ?