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