Illustrated catalogue and general description of improved machine tools for working metal (1899)
Sellers, William, & co. [from old catalog] · Philadephia, Levytype company · leaf 34
inimum distance from centre to centre, 8.Cross-rail carrying drilling-heads counterbalance and quickly adjustable by hand.Has power-feed through positive gearing. Spindles adjustable independently byour patent holdfast, so that any drill may be withdrawn or replaced without stop-ping the others.… … EIGHT-SPINDLE DRILLING MACHINE—for Spur Wheels. For drilling connecting bolt holes in parted spur wheels for electric streetcars. The half wheel is set in a jig, centered by pin shown in work table and byturning half way round, a second half is brought under the drills, while the finishedpiece is…
Machine-tools · Machinery
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