Answer :

Solution :

The correct sequence of machining operations to be performed to finish a large diameter through-hole is drilling, boring, reaming.

Drilling :

- Drilling is an operation to produce a cylindrical hole in a workpiece.

- The tool used in called “drill bit”.

Boring :

- Boring is the process of enlarging a hole that has already been drilled by means of a single-point cutting tool.

- The single-point cutting tool for boring operation is the Boring cutter.

- The boring process can be executed on various machine tools, including lathes (turning centers) or milling machines.

Reamer :

- A reamer is a multipoint cutting tool used for enlarging by finishing previously drilled holes to accurate sizes.

- For reaming with a hand or a machine reamer, the hole drilled should be smaller than the reamer size.