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Striking mechanism

The striking mechanism is a system inside the stapler or nailer that is designed to generate the force needed to drive the fastener, i.e. the staple or nail, into the substrate. When the trigger of the tool is pulled, this mechanism releases the accumulated energy in an instant. This is transferred to a moving part called the 'striker', which is essentially a thin, hard metal bar that directly strikes the nail head or the back of the staple and drives it in at high speed. The way in which the energy for the punch is generated varies according to the type of tool. With pneumatic tools, the force is generated by the violent release of compressed air that moves the striker piston. Electric models use either an electromagnet and spring or, in the case of more powerful cordless machines, a motor spins a flywheel whose motion energy is then used for the blow. In the case of gas nailers, the force is generated by a small explosion of gas. In basic hand-held staplers, the mechanism consists of a strong spring which the user tensions by squeezing the handle.

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