Calculate the spindle speed (RPM) for milling and turning operations.
Parameters
Calculated RPM
Ready to Calculate
Enter cutting speed and diameter to find the optimal RPM.
About this calculator
Overview
Spindle speed is the rotational frequency of the spindle of the machine, measured in revolutions per minute (RPM). Correct speed is crucial for tool life and surface finish.
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Pro Tips
Always start at the lower end of the recommended speed range.
Reduce speed if chatter (vibration) occurs.
Harder materials require slower cutting speeds.
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Fun Facts
"SFM stands for Surface Feet per Minute."
"Carbide tools generally run at 2-3 times the speed of High Speed Steel (HSS)."
"Aluminum can be cut at much higher speeds than steel."
