. Illustrated catalogue and general description of improved machine tools for working metal . EYE-BAR DRILLING MACHINE. Drilliiig-lieads counterbalanced by weights inside of uprights. Verticaladjustment of heads, lo. Height from floor to top of table, 27. Adjustablefriction feed for heads with quick hand traverse. Diameter of spindle, 2H-Ratio of back-gearing, sH to i. Maximum distance between heads to suitrequirements. Especially designed for bridge work. Eye bars put in from front andpassed out back when finished. Heads are united by steel bars and can slidefreely on bed ; the expansion of t
. Illustrated catalogue and general description of improved machine tools for working metal . EYE-BAR DRILLING MACHINE. Drilliiig-lieads counterbalanced by weights inside of uprights. Verticaladjustment of heads, lo. Height from floor to top of table, 27. Adjustablefriction feed for heads with quick hand traverse. Diameter of spindle, 2H-Ratio of back-gearing, sH to i. Maximum distance between heads to suitrequirements. Especially designed for bridge work. Eye bars put in from front andpassed out back when finished. Heads are united by steel bars and can slidefreely on bed ; the expansion of the bars being the same as that of the bridgelinks being bored, uniformity in length of finished work is assured. Work issupported upon projections from upright, hence strains are self contained. i \Vm. Sellers & Co., Incorporated, Philadelphia, Pa. 25 Plate No. DOUBLE DRILLING MACHINE. FOR Connecting Rods, Bridge Chords, etc. Two powerful drill presses, adjustable along a heavy work table with boltslots, spindle, 314 diameter, 12 stroke. Overreach of spindles, 12 from face ofcolumn. Powerful feed adjustable through wide range, and quick hand traverseto counterbalanced spindle. Driven bj independent electric motors, or bycountershaft when preferred. Very powerful, substantial and convenient. 26 Wm. Sellers & Co., Incorporated, Philadelphia, Pa. Multiple Drilling Machines. WE illustrate in the following pages, a variety of multiple vertical drills,which are made to meet different requirements. Such machines aremore or less special in character, and are most useful where frequentrepetition is needed, but some are sufficiently general to possess a wide range ofusefulness. The general use of steel in boiler work and the demand for drilled rivetholes, has directed increased attention to this class of machines, and many newarrangements have bee
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Keywords: ., bookcentury1800, bookdecade1890, bookidillu, booksubjectmachinery
