Illustrated catalogue and general description of improved machine tools for working metal (1899)
Sellers, William, & co. [from old catalog] · Philadephia, Levytype company · leaf 38
DRILLING MACHINE. For flat sheets. Drills arranged in four groups of three spindles, eachgroup having its own feed gear ; spindles adjustable together or independently.Diameter of spindles, 2^4. Stroke, 12. Maximum length of sheet, 24 ft. Drivenby electric motor. Plain work table with bolt slots…
Machine-tools · Machinery
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