Drawing of blind rivets
Boxes for fasteners
Drawing of a battery powered setting tool user for processing blind rivets

Blind rivets

The blind rivet consists of a shank assembled to the rivet mandrel. The handling of blind rivets occurs from one side of the construction elements.

After inserting the rivet into the components bore holes, the rivet mandrel is pulled back by the tool and forms the closing head. The mandrel or parts of it can remain in the shaft after reaching the predetermined break point.

Open, closed or high strength versions, multigrip or expanding blind rivets, with dome head, countersunk head or large head - the variety of available dimensions and types is almost unlimited.

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Blind rivets

How blind rivets work?

The rivet shaft is the element which makes the connection

The rivet shaft is formed by the rivet mandrel and remains in the component on a permanent basis.

1. Mandrel head

2. Shank

3. Setting head

4. Mandrel

The components of a blind rivet.

The shaft type selection is made on the basis of the grounds of:

  • the expected mechanical stress,
  • the required anti-corrosion performance,
  • the component layout,
  • the temperature stress and partly also on
  • the visual impact.
Blind rivet in processed condition.

The rivet mandrel is needed for shaping the rivet shaft

1. Setting head

2. Shank

Blind rivets explained: settting head and rivet shank. Two options.

The mandrel selection is based on the shaft type and on the requirements with regard to processing and operating properties. In order to enhance the rivet’s shearing force, some rivet types use a capti ve mandrel which remains in place after the connection has been made.

1. Mandrel head

2. Break point

3. Knurling option

4. Top

Blind rivets explained: How the rivet mandrel works.

The principle of the setting process

1. Together with the mandrel, the blind rivet is inserted into the setti ng device and introduced into the rivet hole.

Blind rivets explained: Setting process (figure 1)

2. The rivet mandrel is pulled by triggering the stroke with the help of the clamping jaws. The mandrel head reshapes the end of the rivet shaft. When the rivet head is fl ush with the component surface, the process is completed.

Blind rivets explained: Setting process (figure 2)

3. In this position the forces increase and the mandrel fractures on the predetermined break point. The spent part of the mandrel is removed and the captive mandrel remains in the shaft.

Blind rivets explained: Setting process (figure 3)

Processing blind rivets

Special tools are needed for processing blind rivets. These tools have to be chosen on the basis of the rivet type, the field of application and the processing volume.