The cutting temperature of 120 °C and 140 °C was observed when machining with micro-hole textured PCD and PCBN insert, respectively at a cutting velocity of 150 m/min, the feed rate of about 0.5 mm/rev and depth of cut of 1 mm. Fig. 3 shows that there was a 14.2% reduction in cutting temperature with micro-hole textured PCD insert when ...