(If the mandrel shaft does not fall out of its own accord, opening the riveter will push the end of the mandrel out of the socket, and a light tap with a hammer will free it.) The mandrel is pulled out the rivet and dropped out of the rivet gun, ready for the next rivet to be inserted. As the riveter is operated, the mandrel is placed under a great deal of strain and finally the head snaps off and the join is secure. This locks the rivet body very firmly against the surface of the material. As the mandrel is pulled through the rivet, its head increases the diameter of the rivet shaft, bulging it outwards. The mandrel has a head slightly larger than the mandrel’s diameter and the channel in which the mandrel is very snugly seated in the rivet body there is also a slightly narrower section of the mandrel just below the head so that it will break at that point. For the purposes of this feature we’re going to use the term ‘pop’.Īs you know, screws, bolts or nails are used in a very wide range of applications, but often riveting is the best option.Ī pop rivet comprises of the rivet itself (most usually aluminium) through which passes a tightly fitting steel mandrel – rather like a nail. These rivets are also called blind rivets – this name being derived from the fact that they can be used when the operator cannot see the far side of whatever materials he or she is joining. So, here we are going to cover pop rivets (named for the sound they make when their mandrel snaps). Rivets are still widely used in aircraft and in household appliances – particularly in items such as refrigerators, stoves and ovens, microwaves and so on. Welding has now largely taken over in ship, bridge building, buildings and other fields. Rivets of many different types and materials have been used – and continue to be used – in a vast range of applications.įor instance, they have been used in ships, steel bridges, buildings, armoured fighting vehicles, machinery and more.
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