*2.4. Tool Wear Measurement*

Tool wear Qp in cm3/min is calculated as follows (Equation (3)):

$$\text{Qp} = \frac{\text{Vp}}{\text{t}} \tag{3}$$

where Vp is the volume of stone removed during honing (cm3), obtained with the initial and final weight of the stone and with the density of the stone, and t is the honing time in min.
