. Railway mechanical engineer . Four of them arenow being used at various points on the Illinois Cenrtal. NOVEL USE FOR CAR WHEEL BORER It is .-eldoni that a tool designed especiall) for work onone particular part is well adapted to operations on otherparts. A car wheel liorer was, however, converted into a veryefficient machine for boring and facing driving boxes by theaddition of the devices shown in the illustrations below. Thegeneral arrangement of the borer with the special appliancesand some of the details of the special head for the facingbar are shown in the The center o
. Railway mechanical engineer . Four of them arenow being used at various points on the Illinois Cenrtal. NOVEL USE FOR CAR WHEEL BORER It is .-eldoni that a tool designed especiall) for work onone particular part is well adapted to operations on otherparts. A car wheel liorer was, however, converted into a veryefficient machine for boring and facing driving boxes by theaddition of the devices shown in the illustrations below. Thegeneral arrangement of the borer with the special appliancesand some of the details of the special head for the facingbar are shown in the The center of the tablewas bored to receive a brass bushing, and a sjiecial boring barextending into the bushing was provided. It was also neces-sary to design a special head for the facing bar to givesufficient clearance between the table and the facing tool. Theoffset head was forged from mild steel and accurately fittedto the cross bar. In the end of the head a tapering slot wasmachined to take the tool holder. The vertical adjustment. wi^ ! Too/ Holder. Car Wheel Borer, Arranged for Machining Driving Boxes of the tool was secured by a screw controlled b)- bevel gearsand a handle carried in a bracket on the head. The tool washeld in the slot by two set screws. As the special head broughtthe cutting point of the facing tool closer to the axis of thebar than the original arrangement, the rigidity of the bar wasnot impaired. The boring bar, supported by the bushing inthe table, was very rigid and the results obtained with themachine were highly satisfactory. Cutting Steel with Oxygen.—The following examplesof good average cutting are from experiments with a handoxygen cutter, which was only altered as required for thegas corresponding to the thickness of plates: Pressure Metal cut Oxygen consumed of Mild Sleel. per hour. per hour. (atmospheres) A in. 60 ft. 60 cu. ft. 2 40 ft. 90 cu. ft. \A in. 30 ft. 105 cu. ft. 3 2 in. 25 ft. 120 cu. ft. The ox\gen hand-cutter
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
