Problem 5 - Machining Time in Turning (Found in Chapter 21) A turning operation is performed on a cylindrical work part whose diameter = 150 mm and length = 500 mm. Cutting speed = 3.0 m/s, feed = 0.3 mm/rev, and depth of cut = 2 mm. Determine: a. the cutting time and, b. the material removal rate. Problem 6 - Machining Time in Drilling (Found in Chapter 21) A drilling operation is performed to create a through hole on a steel plate that is 20 mm thick. Cutting speed = 0.4 m/s, and feed = 0.20 mm/rev. The 18-mm-diameter twist drill has a point angle of 120. Determine the following once the drill reaches full diameter: a. the machining time and, b. the metal removal rate