The rotating part of a cutting machine that holds and operates the cutting tools or blades.
From 'cutter' (a tool or person that cuts) + 'head' (the top part or main section). Industrial terminology that evolved as machines became more sophisticated in the 19th century.
The cutterhead in a wood planer spins at up to 10,000 RPM—that's faster than a jet engine—and it's why you should never stick your hand in power tools!
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