The Centre Punch and Dot Punch

Dot Punch                                                                   Centre Punch

The centre punch is made up mild steel which has a hardened and tempered point so that it withstands impact with the material it is marking. It is usually used to mark the centre of a hole to be drilled either by hand or on the drilling machine.

Dot punch is a lighter and thinner version of the centre punch and is also used for same purpose. However dot produced by dot punch is smaller than centre punch.

Centre and Dot punches both are used in the same way. A ball peen hammer is commonly used to tap the head of the punch and this delivers enough force to the point of the punch to put a small indentation into the surface of the material.