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Shaft EssayThe Lathe act is one of the most common of metal cutting effects. In tour, a browsepiece is rotated about its axis vertebra vertebra as single-point cutting quills are fed into it, shearing away unwanted material and creating the desired part. Turning gutter occur on both external and internal surfaces to produce an axially-symmetrical contoured part. Parts ranging from pocket watch components to sizable diameter marine propeller shafts can be turned on a lathe. The capacity of a lathe is expressed in two imensions. The maximum part diameter, or swing, and the maximum part length, or outmatch between centers.The primary task of a lathe is to generate cylindrical workpieces. The process of machining a workpiece to the essential construct and size by moving the cutting tool either parallel or erect to the axis of rotation of the workpiece is known as turning. In this process, trim unwanted metal is removed. The machine tool helpful in performing plain tu rning, taper turning, describe cutting, chamfering and knurling by adopting the above method is known as lathe. Schematic illustration of the components of a lathe Schematic illustration of a turning operation showing attainment of cut, d, and feed, f. utting speed is the surface speed of the workpiece at the tool tip. (b) Forces acting on a cutting tool in turning. Fc is the cutting force Ft is the thrust or feed force (in the direction ot teed) and Fr is the radial torce that tends to push the tool away trom the workpiece being machined. Manufacturing processes used during the making of the power shaft Turning Turning in a lathe is to remove excess material from the workpiece to produce a ylindrical surface of required shape and size.Straight turning The work is turned straight when it is made to rotate about the lathe axis and the tool is fed parallel to the lathe axis. The straight turning produces a cylindrical surface by removing excess metal from the workpieces. Step turnin g Step turning is the process of turning different surfaces having different diameters. The work is held between centres and the tool is moved parallel to the axis of the lathe. It is also called shoulder turning. Facing Facing is the operation of machining the ends of a piece of work to produce flat urface square with the axis.The operation involves feeding the tool perpendicular to the axis of rotation of the work. Chamfering Chamfering is the operation of bevelling the extreme end of the workpiece. The form tool used for taper turning may be used for this purpose. Chamfering is an essential operation after thread cutting so that the grump may pass freely on the threaded workpiece. Grooving Grooving is the process of cutting a narrow goove on the cylindrical surface of the workpiece. It is often done at end of a thread or adjacent to a shoulder to leave a mall margin.The furrow may be square, radial or bevelled in shape. Thread cutting Thread cutting is one of the most classic operations performed in a lathe. The process of thread cutting is to produce a helical groove on a cylindrical surface by feeding the tool longitudinally. But we did it manually apply a die. Filling Filing is a final material removal process in manufacturing.