Handbook of construction plant, its cost and efficiency (1918)
Dana, Richard Turner, 1876-1928 · New York, McGraw-Hill book company, inc., [etc., etc.] · leaf 416
-matic stop, quick return, wheel and lever feed. Spindle is coun-terbalanced. The table has vertical adjustment on column bymeans of handle operating gear in rack. Shafts are made of steel.Gears are cut two to one and cone has four steps, 3f| inchesto 81^6 inches diameter. Price $970. A new 20-in.… … Fig. 176. 20-inch Davis Upriglit Drill.
Contractors' operations · Building
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