Bollhoff's new Quicksert Hex offers a quick method of driving
self-tapping threaded inserts into plastic materials. The hexagonal
internal bore of the new fastener enables a plain hexagonal drive pin to
replace the conventional mating thread mandrel. This can be attached to a
battery or pneumatically powered screwdriver for low to medium volume
settings, or for higher volume production, the auto-feed feature of
Bollhoff's Panther screwdriver can achieve cycle times of less than three
seconds.
The M4 and M8 size inserts cut thread into pilot holes either machined or
pre-cast in thermosets or thermoplastics, with an extra small flank angle
increasingly asymmetically to the root of the thread to reduce radial
stresses. For applications requiring a very high unscrewing force on
assembly, Quicksert Hex can be supplied with a left-hand external thread,
so the more the internal right-hand thread is unscrewed, the tighter the
insert becomes embedded in the parent material.