Illustrated catalogue and general description of improved machine tools for working metal (1899)
Sellers, William, & co. [from old catalog] · Philadephia, Levytype company · leaf 88
ientlyshifted, and gears and cones are so proportioned as to produce a series of speedsin geometric proportion without overlapping or irregularity. The lead screwis used for screw-cutting only, and therefore retains its accuracy much longerthan when it is used for all purposes. The turning feeds… … 16 SELF-ACTING SLIDE-LATHE—Turning and Screw-Cutting Feeds. Flat-top shear, with vertical guiding surfaces. Poppet-head lined by underV clamp. Concentric hold-fast for poppet-spindle, clamping spindle at both endsof bearing. Independent screw-cutting and turning-feeds, instantly changeablefrom one…
Machine-tools · Machinery
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