What is drill bit nomenclature?

Drill bit Nomenclature: The tool(drill) and not the work piece is revolved and is fed into the material along its axis. For example , according to material, number and types of flutes, drill size , type of shank(straight or taper) and cutting point geometry etc.

Table of Contents

How are drill bits labeled?

They’re typically labeled by the minimum and maximum size of holes they can cut, and the increment between the steps. (i.e.: “1/4in to 1-3/8in with 1/8in increments”). The size of the hole is typically inside the flute at each step. They’re peerless for drilling precise holes in sheet metal.

What are the parts of a drill bit?

Parts of Drill Bit

Body.
Point.
Shank.
Tang.
Flutes.
Land.
Body Clearance.
Web.

What is drill bit PDF?

A drill bit is a cutting tool used to make or enlarge holes in solid metal. These are used with a manual-operated drill or drill press equipped with a chuck.

What is number 7 drill bit?

A number 7 drill bit is 0.2010 inches. As a fraction, the 0.2010 decimal is 201/1000.

What is the use of drill bit?

A drill bit is a cutting tool used to make or enlarge holes in solid metal. These are used with a manual-operated drill or drill press equipped with a chuck. These drilling machines use a key to tighten or loosen the clamp. A drill is one of the best accessories in a workshop and is required in almost any project.

What is lip angle?

It is defined as the angle between face and minor flank of the single point cutting tool. It depends on the rake and clearance angle provided on the tool.

What are the different types of drill bits used?

Drill bits are generally classified as Twist Drill, Counterbore, Countersink, Flat Bottom Boring, and Specialty. On our web site we have divided these into two categories: Drill Bits – Normally used with hand held drills or drill presses fitted with standard chucks.

What size is #20 drill bit?

Drill Bit Size Chart

Size	Decimal Equivalent	Size
74	0.0225	21
.60 mm	0.0236	20
73	0.024	4.10 mm
72	0.025	4.20 mm