A spring is a flexible elastic object used to store mechanical energy. Springs are usually made out of hardened steel. Small springs can be wound from pre-hardened stock, while larger ones are made from annealed steel and hardened after fabrication. Some non-ferrous metals are also used including phosphor bronze for parts requiring corrosion resistance and beryllium copper for springs carrying electrical current (because of its low electrical resistance).

Types of spring

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The most common types of spring are:

• Coil spring or helical spring - a spring (made by winding a wire around a cylinder) and the conical spring - these are types of torsion spring, because the wire itself is twisted when the spring is compressed or stretched. These are in turn of two types:
  • Tension springs are designed to become longer under load. Their turns are normally touching in the unloaded position, and they have a hook, eye or some other means of attachement at each end.
  • Compression springs are designed to become shorter when loaded. Their turns are not touching in the unloaded position, and they need no attachment points.

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House for sale in Boiling Springs, SC - 2-car garage, Granite Cntr. 224,700 - 3BR/2BA 1800sf http://tlre.us/8791.aspx
House for sale in Boiling Springs, SC - 2-car garage, Granite Cntr. 224,700 - 3BR/2BA 1800sf http://tlre.us/8791.aspx
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