# Turning feeds, speeds and time
# Scope: Ideal turning RPM and axial feed at constant surface speed.
# Status: illustrative worked example; engineering review pending.
# Inputs are example values. Checks are editable example requirements, not standards.

diameter = 30 mm
cuttingSpeed = 100 m/min
feedPerRevolution = 0.1 mm

speed := 2*cuttingSpeed/diameter [rpm]
feed := cuttingSpeed*feedPerRevolution/(pi*diameter) [mm/s]

check spindle speed budget: speed <= 2000 rpm

scenario alternative: diameter = 24 mm