Revolotions = n = Vc x 1000   Revs / min
                    π x D

*n : Revolotions (rev./min)
*Vc : Cutting Speed (m./dk)

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Cutting Speed = Vc =  π x Dxn   meter / min
                         1000

*D : Workpiece diametre (mm)
*π : Constant (3,14)