Speed in advance

In Machining, the speed in advance $v\_f$ is a speed expressed in Millimètre by minute (mm/min).

It depends on the type of operation carried out, the tool, the surface quality wished, etc

To determine speed in advance $v\_f$ in Millimetre by minute (mm/min):

$v\_f\; =\; f\_z\; \backslash \; cdot\; Z\; \backslash \; cdot\; n$
$v\_f$: speed in advance in mm/min
$f\_z$: advances by tooth in mm/dent
$z$: many teeth of the outil
$n$: rotational frequency out of turns/minute

The formula can be written differently according to the operation of machining (Tournage, Fraisage, Perçage, Rectification, etc)

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