Power hammers are mechanical forging hammers that use a non-muscular power source to raise the hammer preparatory to striking, and accelerate it onto the work being hammered. Also called `Open Die Power Forging Hammers.` They have been used by blacksmiths, bladesmiths, metalworkers, and manufacturers since the late 1880s. ==Design and operation=.....
Found on
http://en.wikipedia.org/wiki/Power_hammer
noun a power tool for drilling rocks
Found on
https://www.encyclo.co.uk/local/20974
No exact match found.
