Handbook of construction plant, its cost and efficiency (1914)
Dana, Richard Turner, 1876-1928 · Chicago, The M. C. Clark Publishing Co. · leaf 261
ays: The power drill-sharpener has re-moved many of theshortcomings attend-ant upon the handsharpening process,with the result thatwhere these machinesare used it is possibleto accomplish from 25to 100 per cent moredrilling than underthe old methods. Itake this to mean 25to 100 per cent… … Fig. 89 A. HAND HAMMER DRILLS Hand Hammer Drills are light, powerful, small tools which areadapted to light work in mines and quarries. Imperial Hand Hammer Drill No. MV2, complete $60.00 1 drill, 12-inch 1.15 1 drill, 24-inch 1.55 1 drill, 36-inch 2.00 1 drill, 48-inch 2.50 1 dolly 2.50 25 ft. of…
Contractors' operations · Building
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