The depth of cut (w)is the thickness of metal removed from the bar,measured in a radial direction. The product of these three gives the rate of metal removal,a parameter often used in measuring the efficiency of a cutting operation. V fw=rate of metal removalThe depth of cut (w) is the thickness of metal removed from the bar, measured in a radial direction. The product of these three gives the rate of metal removal, a parameter often used in measuring the efficiency of a cutting operation. V f w = rate of metal removal