Pop rivet dimensions12/9/2023 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. Where a flush surface is required, the countersunk head style should be selected.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. However, when soft or brittle materials are fastened to a rigid backing member, the large flange head should be considered because it offers twice the bearing surface. The low-profile domed head is appropriate for most applications. As a rule, the rivet materials should have the same physical and mechanical properties as the materials to be fastened, because a marked dissimilarity may cause joint failure due either to material fatigue or galvanic corrosion. Nature of materialsīoth the rivet and the materials to be fastened will affect the ultimate joint strength. Remember that insufficient rivet length will not allow proper formation of the secondary head at the back of the work. You must select a rivet with a grip range that includes the work thickness required. This determines the required "grip" of the rivet you select. Measure the total thickness of the materials to be joined. POP ® brand rivets are not certified for structural aerospace applications and such use is not recommended. Then refer to the "Shear" and "Tensile" in the Rivet Selection Guide on the product and select a POP ® brand rivet that provides the values required. These are functions of total joint strength, fastener spacing, rivet body material, and rivet diameter. Joint strengthįirst determine the single-joint tensile and shear values required for the application. The load applied to a fastener along its length. The load applied to a fastener along the joint interface. The recommended thickness range over which the body length will consistently provide a proper setting in a hole of the specified diameter. (Best practice is to follow the hole size recommendations provided).Īvoid burrs in and around the holes. It may also cause bulging or separation of the members by allowing the rivet to expand between them instead of only on the blind side. Too large a hole will reduce the shear and tensile strengths. Too small a hole will, of course, make rivet insertion difficult. Hole size can be important in blind riveting. This illustration provides a graphic representation of the POP ® blind rivet selection factors described below.
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