Stone has been carved using pneumatic hammers and chisels since the late 19th Century; the chisel is struck hundreds of times a minute by a vibrating piston. Force is controlled by adjusting the air pressure supplied to the pneumatic hammer.
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Stone has been carved using pneumatic hammers and chisels since the late 19th Century; the chisel is struck hundreds of times a minute by a vibrating piston. Force is controlled by adjusting the air pressure supplied to the pneumatic hammer.