Computer Numerical Control (CNC) is an automated manufacturing process in which machine tools are controlled by computers executing pre-programmed sequences of machine control commands.

CNC replaces manual operation with precise, repeatable, and efficient machining.

Key Features

  • Computer-controlled operations

  • High precision and accuracy

  • Automation of machining processes

  • Ability to produce complex shapes


Bench work refers to a variety of manual operations carried out on a workbench. These

tasks include measuring, marking, cutting, filing, drilling, tapping, and assembling parts.

A fitter’s work is unavoidable when different parts are to be assembled in position after

they have been finished. Alignment of machine parts, bearings, engine slide valves and

similar other works call for a fitter’s work. Reconditioning and refitting of machines and

machine parts cannot be done without a skilled fitter.

All the above types of work require the use of a large number of hand tools and a fitter

must have good working knowledge of all these tools and instruments.