Image from page 82 of "Illustrated catalogue and general description of improved machine tools for working metal" (1899)
Publisher: Philadephia, Levytype company
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress
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Text Appearing Before Image:
EXTRA HEAVY 5-FOOT MILL—Designed for Steel Work. Diameter of table, 6i. Height under cross-head in highest position, 36.Steel vertical slides, having 22 stroke. Two saddles on cross-head with inde-pendent feed-motions, operated b)^ feeding mechanism at each end of the cross-head. Feed mechanism and driving-gear provided with safety devices. Cross-head lifted by power. Spur driving-gear for table, all cut teeth. Feeds adjust-able from .01 to i per turn of table. Largest lift of cone-pulley, 24 and 4face. Wrenches, sample boring-bar, overhead countershaft, and counterbalancesfor vertical slides. 20 by 5 fast and loose pulleys on countershaft. Shouldmake no revolutions per minute. Self-contained; no separate foundationrequired for step or other parts. Wm. Sellkrs & Co., Incorporated, Philadei-phia, Pa. 77 Plate No. 62.
Text Appearing After Image:
EXTRA HEAVY 7-FOOT BORING MILL—with Triple Gearing. This machine is designed especially for very heavy work in steel, such aslocomotive tires. Table, 84 diameter. Height under cross-head in highestposition, 39. Depth of cross-head bar, 3o38. Steel vertical slides of stroke of26^, with special detachable tool-holders, designed for tire and ring work.Cross-head raised and lowered by power. Two saddles, having independent feed-motions, operated from mechanism at both ends of cross-head. Feed mechanismand driving-gear provided with safety devices to prevent breakage by overloadinggearing. Cone-pulley has five lifts, and there are two changes of gearing, making15 distinct speeds. Spur-gearing for table is all cut. Wrenches, complete over-head countershaft and hangers. Speed of countershaft should be 280 revolutionsper minute. Fast and loose pulleys on countershaft, 22 diameter, 5 face.Made also ivith plain tool-holders and bo>-iNo-bar. No separate foinidationrequired for step or other
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