Specialty Screws - Interstate Screw Corporation

8
Superior Installation: The installation of screws into
your application should be easy and trouble free. Many
factors relating to the screw, the application materials and the
installation tools used can affect your installation process.
Drive Torque: Drive torque should be very low to allow
for a quick and easy installation of the screw. Your drive torque
will be directly related to the friction between the screw and the
inside of the hole. Swageform’s patented lobes on its tapered
point reduce drive torque. These lobes limit the initial contact
with the hole while still allowing for the forming of threads. The
result is low drive torques in your assembly process.
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Swageform ®
High Performance Thread Rolling Screws For Metals
Swageform vs. The Competition – Test Results
SWAGEFORM VS. TAPTITE ® TRILOBE (#10-24)
Strip Torque: The torque required for the screw to
strip-out in your application is recommended to be as high as
possible, as strip-out results in scrap or costly rework
operations. Swageform, while providing low drive torques, also
provides very high strip torques. As a Swageform penetrates
into the hole during installation, you progress from the tapered
pilot with the lobes, to the full bodied screw shank. This full
bodied screw shank is 360° around and thus provides a full
360° of frictional contact with your application. This complete
frictional contact results in very high strip torques in your
assembly process.
Test Results: The drive and strip torques of our Swageform have been measured against common tri-lobular threadforming
screws. The difference between the drive and strip torque for a given screw is referred to as your installation torque window. Below
is a graphical representation of these tests. Each bar represents the difference between the drive torque and the strip torque for an
individual screw. You can see that the torque window for Swageform is significantly larger than with a Taptite ® screw.
Torque Difference Strip to Drive (Inch – Lbs.)
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This increased torque window reduces stripped out assemblies resulting in:
■ A reduction of scrapped or reworked assemblies
■ Increased productivity
Swageform
Taptite ® Trilobe
■ A more forgiving environment to screw guns where
torques can run high due to a less than optimum
maintenance schedule
Superior Strength In The Field: During installation, Swageform screws form threads by swaging or compacting the metal. This
method of threadforming work hardens the material, making it denser and stronger. The result is a much stronger assembly when
compared to thread cutting screws (Type F or Type T) which cut away chips and weaken the application material. In addition,
Swageform’s fully rounded 360° body provides the maximum amount of grip between the screw and the hole. Compared to a trilobular
threadforming screw which only grips the hole at three points, a Swageform provides a far stronger assembly in the field.
The result is higher pull-out strengths and higher tensile loads.
CERTIFIED
ISO 9001 • QS 9000
ISO 14001
Emhart Fastening Teknologies • US Tel (203) 944-1711 • Fax (800) 220-4286
Europe Tel 44-121 356 4811 • Fax 44-121 331 2281
Mexico Tel 52-5-326-7100 • Fax 52-5-326-7141