Helical coiled thread inserts are available
by many brand names. Regardless of name, they all serve the same
function of protecting tapped threads from stripping or seizing
and providing superior thread strength over the tapped material
alone. Their unique design of coiled wire with a diamond shaped
cross-section is highly adaptable inmost materials. They are lightweight,
ductile, and space saving while still providing strength. The coiled
diameter is slightly larger than the recommended tapped hole allowing
the insert to expand and anchor itself within the hole.
Two styles are available: STANDARD
has the free running threads, and LOCKING has a
coiled of crimped turns which will lock onto the mating bolt. Most
sizes are available in 18-8 stainless steel but can also be ordered
in Phosphor Bronze and Inconel X-750 in some sizes. Installation
tools including taps, tang break-off tools and installation data
are available for your information - simply ask your sales representative.
There are many styles of inserts on the
market today. Generally they all have internal threads and some
kind of outside knurl - either cross-hatched, diamond or grooved
diagonals which allow for molding material to adhere to the insert.
Some inserts may be more like a bushing
with both internal and external threads. They may be slotted or
drilled, or the thread design may be ribbed to automatically tap
threads as thee insert is tightened down. Your requirement may be
a readily available stock item if it is similar in design to those
shown below. Custom inserts can be manufactured to your specifications
with short lead times. Simply fax over a print for quote.