The surface roughness of a workpiece depends mainly on the tool geometry, overlap cuts made by the tool tip and lateral plastic flow of the work material. With the increase in cutting speed, surface finish is found to improve (Fig. 23) though the improvement is very limited; that is, there is a decrement of 0.6–0.7 microns in surface roughness. Usually, in metal cutting at higher cutting speed better surface finish is produced. The conventional explanation of this phenomenon is related to built-up-edge (BUE) formation [31]. The formation of BUE is up to some low range of cutting velocity, and with the increase in cutting velocity, the BUE will be removed, and as a consequence of this, surface finish improves.