Die Punches and Standard Punch Sizes

Punches are made in various shapes and sizes depending on where and how they’ll be used. Punches are generally classified by how they’re mounted to the punch plate. These are;

1. Shouldered cylindrical flange-head punches,
2. Shouldered plain cylindrical-head punches,
3. Countersunk-head punches,
4. Punches of various other types and profiles.

Shouldered cylindrical flange-head punches are widely used. These punches are generally preferred in dies with high piercing or blanking force. (Image above.)

The standard dimensions of shouldered cylindrical flange-head punches are given above.

Special-purpose standard punches (above)

A shouldered plain cylindrical-head punch (above). Shouldered plain cylindrical-head punches are mounted to the punch plate with the help of a spring-loaded ball. These punches are used in dies with low piercing or blanking force.

Shouldered plain cylindrical-head punch and the ball dimensions used (above)

Countersunk-head punches, like plain cylindrical-head punches, are generally used in small dies with low piercing and blanking force.