Boring Tool

Boring Tool

Boring Tool - A boring tool is a cutting tool which can be held in a boring bar or a boring head for carrying out necessary operations on a boring machine.

A boring tool for use on a horizontal boring machine is of rotating type. In other words, the tool mounted on the boring bar rotates and cuts the job that due to its awkward shape or bulky size is kept stationary.

Most boring operations use a single point cutting tool. The rotating cutting tool or cutter is fed through the hole in the job.

Different types of boring tools. Shown at

Boring Tools

A is light boring tool.

B is forged boring tool and then ground to shape at the cutting tip.

C is the boring bar which is designed to hold a small, H.S.S., steel bit at the end. The bar supporting the tool is rigid and may be adjusted according to hole length.

In production work boring cutters with more cutting edges are widely used.

D is a double ended boring tool.

E is a multiple cutting edges boring tool. It is provided with inserted tooth cutters which may be adjusted radially to compensate for wear and variations of diameter. For production jobs, such tools are more economical. They have a longer life as compared to single point cutting tools.

F, a counterboring tool to insure concentric diameters, is designed to enlarge one end of a hole.

G shows the geometry of a boring tool (IS : 30191973).

Boring tool material

Boring tools may be of

(i) Solid H.S.S.,

(ii) Brazed carbide.

(iii) Disposable carbide inserts,

(iv)Diamond tipped type.

For precision boring, cemented carbide or diamond tools are used. Ceramic tools are used for materials which tend to weld with the tool edge. They are not suitable for interrupted cuts. Diamond tools can be used only with nonferrous materials.