Bar channeler

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A reciprocating drill mounted on a bar by means of which holes are drilled close together in line by shifting the drill from point to point along the bar. Thereafter, the webs between the holes are removed with a reciprocating chisel-pointed broaching tool that is substituted for the drill. This method of channeling is generally employed in the harder rocks, such as granites. Hess

Source: Dictionary of Mining, Mineral, and Related Terms


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