Find IPM given IPR and RPM

Drilling formula to find feed rate in inches per minute when given inches per revolution and revolutions per minute.

All data as-is, reference only

This formula converts a feedrate given in inches per revolution (fn) to a feedrate given in inches per minute (fm). This is useful in programming drilling cycles in CNC machines.

Note that the symbol for RPM is often n so you may see formulas that use n used instead.