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CNC operator can calculate constant surface speed in metric units using this formula:

Sp = 0.00314 * D * Sn;

Sp - cutting speed in meter per minute (m/min),
D - diameter in millimeters (cutter diameter for milling or part diameter for turning),
Sn - CNC machine spindle speed, revolutions per minute (r/min).

To calculate the constant surface speed in meter per minute enter the CNC equipment spindle speed in revolutions per minute and diameter in millimeters  and click the CALCULATE button.

The program will calculate the cutting speed in meter per minute.


   D =          

 Sn  =     


 Sp =   


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