Calculating Cutting Speeds

Cutting Speed and Spindle Speed Calculations

1. Cutting Speed

 

Where :

CS = cutting speed in m/min

D = diameter of work in mm

N = spindle speed in revolutions per minute (RPM) in rev/min

π = the constant pie (3.142)

2. Spindle speed

Where:

CS = cutting speed in m/min

D = diameter of work in mm

N = spindle speed in revolutions per minute (RPM) in rev/min

π = the constant pie (3.142)

3. Machining / Cutting Time

Where:

T = Cutting time in seconds.

L = length of cut in mm.

Q = number of cuts taken

f = feed rate in mm/rev.

N = Spindle speed (RPM) in rev/min.