Stops and Side Gauges in Blanking Dies

Stops are elements that ensure the strip is advanced by the desired pitch. There are several main types. They can be used on their own, or together with guide pins.

Types of Stops

First stops
Second, third … etc. stops
Final stops

Types of Stops by Design

1. Simple stops
2. Fixed pin stops
3. Spring-loaded pin stops
4. Manually push- or pull-operated stops
5. Lever-type stops
6. Side gauges
7. Automatic stops
   • Mechanically actuated automatic stops
   • Hydraulically or pneumatically controlled automatic stops

In progressive dies, the 1st and 2nd stops are used in sequence when starting the cut. The final stop, on the other hand, is used until the strip runs out.

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Showing stops on the die (above)

Side Gauges

With stops, precision can only go so far. In cases where more precise feeding is needed — particularly when the sheet thickness is less than 0.3 mm, the holes are too small for a stop pin to fit into, and in progressive dies — a side gauge is used.

Why and When Is a Side Gauge Preferred?

A side gauge is preferred in high-volume production dies,
when cutting thin materials,
when fast operation is needed,
and in cases where a more precise feed is required.

The length of the side gauge equals the pitch. If the distance between the main punch hole and the side gauge becomes too small, the side gauge can be moved one pitch forward or backward.

Positions and pitch of the rear and front side gauges (top view)

Side gauge shapes (above)

Practice Questions

Which of the following is not one of the types of side gauges? A) Straight side gauges B) Straight and heeled side gauges C) Jaw-type and heeled side gauges D) Heeled side gauges

Which of the following is not a reason for using a side gauge in blanking and piercing dies? A) To achieve a more precise feed B) When fast operation is desired C) When cutting thin materials D) When cutting thick materials

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