What is Feed per Revolution ?
Feed per Revolution (Usually designated by Fn) is the linear distance that the cutting edge travels during a single spindle rotation. In Milling and Drilling, it is a single rotation of the cutting tool. In Turning, Grooving, and Parting it a single rotation of the workpiece.
Feed per revolution in Milling
It is calculated in two ways:
- Dividing the Table Feed by the Spindle Speed.
- Multiplying the Feed per Tooth by the Number of teeth
It is an auxiliary parameter that is used to calculate the table feed, based on the cutter’s chip load and the Feed per Tooth.
Feed Per Revolution Milling Formula
- Vf – Table Feed [mm/min or Inch/min]
- Fn – Feed per revolution [mm/rev or Inch/rev]
- Fz – Feed per Tooth [mm/tooth or Inch/tooth]
- n – Spindle Speed [RPM]
\( \large F_n= \huge \frac{ \unicode{86}_f}{n}\)
\( \large F_n= F_z \times n\)
\( \large F_n= F_z \times n\)
Feed per revolution in Drilling
It is calculated by:
- Dividing the Penetration Rate by the Spindle Speed.
It is used to calculate the Penetration Rate.
Feed Per Revolution Drilling Formula
- Vf – Penetration Rate [mm/min or Inch/min]
- n – Spindle Speed [RPM]
- Fn – Feed per revolution [mm/rev or Inch/rev]
\( \large F_n= \huge \frac { \unicode{86}_f}{n}\)
Feed per revolution in Turning
