. Railway master mechanic [microform] . a gang drill with several spindles for drillingarch bars and other pieces which are to be duplicated andrequire several holes to be drilled in each piece, saves muchtime and labor. This fact is evinced by the extent to whichrailroad companies and car manufacturers are installingsuch machines. A machine for this class of work is illus-trated by the photo-engraving presented herewith and thefollowing specifications appear of no little interest: Maxi- April, 1904. RAILWAY MASTER MECHANIC 137 mum distance, spindles to table, 18 in.; minimum, 6 of
. Railway master mechanic [microform] . a gang drill with several spindles for drillingarch bars and other pieces which are to be duplicated andrequire several holes to be drilled in each piece, saves muchtime and labor. This fact is evinced by the extent to whichrailroad companies and car manufacturers are installingsuch machines. A machine for this class of work is illus-trated by the photo-engraving presented herewith and thefollowing specifications appear of no little interest: Maxi- April, 1904. RAILWAY MASTER MECHANIC 137 mum distance, spindles to table, 18 in.; minimum, 6 of spindles, 12 in. Maximum distance betweenspindle centers, 8 in. or 10 in. Distance, center to center out-side spindles, 9 ft. 10 in. Diameter of spindle, 2 in. Dis-tance between housings, 11 ft, Floor space, 13 ft. 6 in. x 4 , 7 ft. 10 in. Weight, 13,500 lbs. The heads are movable laterally upon the rail. Eachspindle is counterbalanced and has independent vertical ad-justment, for varying lengths of drills. They are driven by. Six Spindle Gang Drill. gearing from the top shaft, and controlled by clutches, whichare actuated by a handle, placed in front of each head withineasy grasp of the operator. This machine has hand andpower feed. It has a quick approach and return movement,operated by a lever, by which all the drills can be instantlylowered to, or raised from, the work together. The feedmotion is universal, but any of the spindles can be discon-nected at will, making any portion of them independent ofthe others. Three changes of feed are provided, and changegears can be supplied to give any required feed. The tableshave both a lateral and transverse movement. The lateralmovement is by a hand wheel and screw. The wheel isgraduated and provided with a stop. Each graduation of thewheel represents a table movement of 1-16 inch; one revolu- tion of the wheel, a table movement of y2 inch. It also hasa transverse movement of 8 inches, by means of a lever andgearing. By t
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Keywords: ., bookcentury1800, bookdecade1890, bookidrailwaymaste, bookyear1895
