Piston drill | Article about piston drill by The Free Dictionary
piston drill[′pis·tən ¦dril]
A heavy percussion-type rock drill mounted either on a horizontal bar or on a short horizontal arm fastened to a vertical column; drills holes to 6 inches (15 centimeters) in diameter. Also known as reciprocating drill.
References in periodicals archive
Stably higher demand for piston drill
pumps in comparison to the demand for plunger drill pumps was reasoned by a lower cost of this type of equipment, longer wearability of details and a possibility to replace it more quickly.
In previous editions of the Balance Piston drills
, as many as 2,000 Filipino soldiers from different branches of the armed services took part.