The key feature of the TIFAS® Maxgrip is the design of the blind side footprint. As the rivet is being installed, the sleeve material moves radially outwards to form a disk-like blind side footprint. At the same time, the mandrel head does not plunge into the sleeve but deforms on swaging, much like a pair of bellows. Compared to standard blind rivets, the diameter of the blind side footprint generated by TIFAS® Maxgrip rivets is not only larger but their more favourable shape makes for a stronger fastening. The blind side footprint of the TIFAS® Maxgrip is larger, which enables the disk-shaped head to rest on the rivet. The level of resistance to the installed rivet becoming unriveted is therefore significantly higher.
Large grip range
When using conventional blind rivets, the thickness of the components that need to be joined may only vary to a small degree. For example, three different blind rivets of differing lengths need to be used for grip ranges of between 1.5 and 4.0 mm. The TIFAS® Maxgrip simplifies this situation as it requires just one rivet to cover a grip range of 1.5 – 4.0 mm.
Mandrel retention
In the automotive industry, it is imperative that blind rivets do not cause any rattling once they have been installed. Any possibility of the spent mandrel or any relative movement between the sleeve and the spent mandrel making a noise must be eliminated. By mechanically retaining the mandrel, the TIFAS® Maxgrip ensures every single time that the spent mandrel in the installed blind rivet sits securely even when subjected to heavy vibrations.
Watertight
The principle used with the TIFAS® Maxgrip of clamping the sleeve material against the mandrel to make sure the mandrel is retained also serves to seal the rivet sleeve bore. This means that the TIFAS® Maxgrip is also watertight.
Rolled mandrel
The body of the mandrel is rolled to extend the tool life of the jaws.
Lead-in chamfer
A lead-in chamfer on the rivet head facilitates insertion of the rivet into the bore and reduces rivet installation times.