illustrate the following lathe machine left cutting tools; i. facing ii. roughing iii. finishing

i. Facing is a lathe machine operation that involves the use of a facing tool, which is a type of cutting tool with a flat or slightly concave cutting edge. Facing is used to create a flat and smooth surface on the end of a workpiece, and it is typically used to square up the ends of a part or to remove any burrs or other imperfections.

To perform facing on a lathe machine, the facing tool is mounted in the tool holder and positioned against the end of the workpiece. The lathe is started and the workpiece is rotated, and the facing tool is advanced into the workpiece, cutting a shallow groove along the end of the workpiece. The facing tool is then withdrawn, and the process is repeated until the desired surface finish is achieved.

ii. Roughing is a lathe machine operation that involves the use of a roughing tool, which is a type of cutting tool with a cutting edge that is designed to remove a large amount of material quickly. Roughing is typically used to remove excess material from a workpiece, or to rough out the shape of a part, and it is often used in conjunction with other machining operations, such as facing or finishing.

To perform roughing on a lathe machine, the roughing tool is mounted in the tool holder and positioned against the workpiece. The lathe is started and the workpiece is rotated, and the roughing tool is advanced into the workpiece, cutting a deep groove along the length of the workpiece. The roughing tool is then withdrawn, and the process is repeated until the desired shape and size are achieved.

iii. Finishing is a lathe machine operation that involves the use of a finishing tool, which is a type of cutting tool with a cutting edge that is designed to produce a smooth and accurate finish on a workpiece. Finishing is typically used to remove any remaining imperfections or roughness on a part, and it is often used to achieve a precise size and shape on a part.