Which type of operation is NOT performed by a lathe?

A lathe is primarily designed to perform turning operations, where material is removed from a workpiece as it rotates against a cutting tool. This allows for the creation of cylindrical shapes and precise dimensions. The turning process is fundamental to lathe operation, making it one of the core functions of this machine.

Cutting is also a primary function of a lathe, as the tool engages with the rotating material to reshape it. Drilling can be performed on a lathe when equipped with a tailstock and a drill bit, allowing for the creation of holes while the material is rotated.

Grinding, however, is not a standard operation performed on a lathe. Although grinding is a material removal process, it typically requires a different type of machine, such as a grinder, which uses an abrasive wheel to achieve smooth finishes and precise dimensions. Therefore, it is correct to identify grinding as the operation that is not performed by a lathe.