Experiment no: 03 Objective: ToPerform Taper Turning using Compound Rest on lathe Machine. Apparatus: •Single point cutting tool•Lathe •Vernier caliper •Try square Fig 01: Drawing of Stock •Chuck keyMaterial used: Mild steel rod. Theory: Taper Turning: When the diameter of a piece changes uniformly from one end to the other, Fig 02: Drawing of finished job the piece is said to be tapered. Taper turning as a machining operation is the gradual reduction in diameter from one part of a cylindrical workpiece to another part. Tapers can be either external or internal. If a workpiece is tapered on the outside, it has an external taper; if it is tapered on the inside, it has an internal taper. There are three basic methods of turning tapers with a lathe. Depending on the degree, length, location of the taper (internal or external), and the number of pieces to be done, the operator will either use the compound rest, offset the tailstock, or use the taper attachment. With any of these methods the cutting edge of the tool bit must be set exactly on center with the axis of the workpiece or the work will not be truly conical and the rate of taper will vary with each cut.