Machinist can calculate part diameter in constant surface speed in metric units using this formula:

D = 318.3 * Sp / Sn;

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

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

The program will calculate the diameter in millimeters (cutter diameter for milling or part diameter for turning).

   Sp =          

  Sn  =       

 D =   

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