Operation and use
A needle gun has a set of very fine chisels known as needles. The tool forces these needles against a work surface at variable speeds up to around 5,000 times per minute. Different models offer choices of number of needles, operating speed, and power levels. Many models use compressed air, although electrical needle-guns do exist.
In a pneumatic unit, compressed air forces a piston forwards and backwards. This movement causes the needles to move back and forth ...
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