Sinker drill | Article about sinker drill by The Free Dictionary
sinker drill[′siŋ·kər ‚dril]
A jackhammer type of rock drill used in shaft sinkings. Also known as sinker.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive
The mast-mounted Stanley SK-58 hydraulic sinker drill is equipped with a 2-in.
After the surface hole has been created, the sinker drill is retracted and swung out of the way so the auger can be fed directly into the bar hole.