Nail gun
It is usually driven by compressed air (pneumatic), electromagnetism, highly flammable gases such as butane or propane, or, for powder-actuated tools, a small explosive charge.
[1][2] The first nail gun used air pressure and was introduced to the market in 1950 to speed the construction of housing floor sheathing and sub-floors.
Some full head nail guns, especially those used for pallet making and roofing, use long plastic or wire collated coils.
Industrial nailers designed for use against steel or concrete may have a self-loading action for the explosive caps, but most need nails to be loaded by hand.
The smallest size of fasteners are normally 23 gauge (0.025 inches or 0.64 millimetres in diameter), commonly called "pin nailers" and generally have only a minimal head.
They are used for attaching everything from beadings, mouldings and so forth to furniture all the way up to medium-sized 7 to 8 inches (18 to 20 cm) baseboard, crown molding and casing.
In the United States, about 42,000 people every year go to emergency rooms with injuries from nail guns, according to the U.S. Centers for Disease Control (CDC).
The U.S. Consumer Product Safety Commission estimates that treating nail gun wounds costs at least $338 million per year nationally in emergency medical care, rehabilitation, and workers' compensation.
According to a 2002 engineering report from the Consumer Products Safety Commission (CPSC), the recoil and firing of the second nail occurs well before the trigger can be released.
[10] In June 2013, NIOSH released an instructional comic providing information on nail gun hazards and ways to use the device properly.
Thus, it is dependent on both a compressor and a power source to operate the compressor (either direct electrical current or an on-site generator), and encumbered in use by a cumbersome high-pressure air hose (which may be extremely stiff in cold weather, and retain an annoying "memory" of having been coiled at any time).
A pneumatic nail gun is also limited by the size and rebound rate of its compressor in the number of fasteners it can drive consecutively.
Historically pneumatic air guns required daily oiling (at a minimum), though "oil-free" versions are also produced.
Powered by a gas (e.g. propane) and air explosion in a small cylinder; the piston pushes the nail directly and there are no rotating parts.
In multi-solenoid coilguns a short burst of power from a big capacitor (one attached to each solenoid) comes at the right time to propel the piston or projectile.
They can also work as temporary fasteners for pieces with irregular shapes that are impossible to hold down with a clamp securely.
