The cutting speed (V)is the rate at which the uncut surface of the work passes the cutting edge of the tool-usually expressed in units of m/min. The feed (f)is the distance moved by the tool in an axial direction at each revolution of the workThe cutting speed (V) is the rate at which the uncut surface of the work passes the cutting edge of the tool-usually expressed in units of m/min. The feed (f) is the distance moved by the tool in an axial direction at each revolution of the work