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Manufacturer
of small coil springs, industrial springs, medical wire forms,
torsion springs, extension springs, stainless steel springs, and
much more! |
Extension Springs |
click to view larger imageExtension Springs are coil springs designed to be stretched from free length to a longer extended length to store energy, to provide a resistance to a pulling force or to provide a restoring force. They are usually close wound, meaning that each coil is held tightly against the adjacent coil(s). The force holding the coils together is called the initial tension. This force must be overcome before the coils will start to open up as a stretching force is applied to the spring. Extension springs can be made with open wound coils for applications that require a zero initial tension or when the spring needs to function as both an extension spring and a compression spring. However, open wound extension springs tend to tangle easily.
Extension springs are commonly produced with open hooks or closed loops on the ends so that they can be connected to other components. A wide range of end configurations can be produced to meet a wide range of connection requirements. For more on common end types click here. |
Typical applications for extension springs are to store
and then release energy, as in a trampoline spring; to return
a component to its initial position after a force has been
applied and released, as in a throttle return spring; to
provide a steady pressure, as in a windshield wiper blade
spring; or to resist an applied force, as in a flow meter
spring.
At Templeman, we can produce all of the above types
of extension springs to your exact specifications. We are
well equipped to work within the following size ranges: |
Wire Diameter – 0.004” [0.1 mm] to 0.080” [2.0 mm]
Coil Outside Diameter – 0.030” [0.75 mm] to 1.75” [45 mm]
Free Length – Up to 16” [40 cm]
Spring Index – 4 to 24 (Mean Coil Diameter divided by Wire Diameter)
To use our interactive form to submit your design requirements for design consultation or quotation, please click here. For a look at our selection of stock extension springs, please click here. |
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Manufacturers
of small springs and wire forms for the medical, fiber optic, electromechanical,
automotive, electronics, hardware, pneumatic controls, crafts and hobbies,
telecommunications, industrial instruments, consumer goods, jewlery, and
sporting equipment industries.
The
D.R. Templeman Company
1-800-203-4290
1 Northwest Dr., Plainville, CT 06062 USA
860-747-2709 • Fax: 860-747-8297
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