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Pneumatic Rock Drill
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Description: It consists of a steam cylinder and piston and its rod, and to the rod is firmly secured a steel rock-drill. The cylinder is supported upon a heavy tripod that may stand in any position and present the point of the drill in any direction. The steam or compressed air is conveyed to the cylinder through a hose, and when ready for work it delivers its tremendous thundering blows upon the rock in rapid succession.
Source: Barnard, Charles Tools and Machines (New York: Silver, Burdett and Company, 1903) 133
Keywords: jackhammer, jack hammer, pneumatic rock drill, bore, break up, auger, drilling tool, hole maker
Copyright: 2009, Florida Center for Instructional Technology. See license.
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