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The most widely used type of spring made from wire stock coiled as a constant diameter into a helical form, the load being applied by compression along the helix axis. Other forms include: conical, tapered and concave.



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Spring made from wire stock coiled into helical form with special ends to allow the helix to be extended.



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Similar in form to the helical compression springs, these are loaded by torque about the helix axis. To transmit this torque, special ends are normally required. Also available in a double torsion style.


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