. Railway mechanical engineer . o one motor speedrange and 16-point controller, M different speeds are ob-tained with a single back gear ratio of five to one. Six spindle feeds are provided for this drill from 009 into .070 in. fier revolution. The feed is cut in or out hxmeans of a trip lever and quick return or advance securedb\- the handwheel en the quill pinion shaft. The carriageelevating and lowering mechanism is operated b\- power orhand and the driving gear is provided with a limiting torqueclutch as a safety feature. The hand adjustment is usedonly to secure final setting of the carri
. Railway mechanical engineer . o one motor speedrange and 16-point controller, M different speeds are ob-tained with a single back gear ratio of five to one. Six spindle feeds are provided for this drill from 009 into .070 in. fier revolution. The feed is cut in or out hxmeans of a trip lever and quick return or advance securedb\- the handwheel en the quill pinion shaft. The carriageelevating and lowering mechanism is operated b\- power orhand and the driving gear is provided with a limiting torqueclutch as a safety feature. The hand adjustment is usedonly to secure final setting of the carriage. A steel scaleon the face of the column indicates the distance from the topof the table to the center of the sjjindle. The standard taljle furnished th the machine is 4 ft. Boring Machine wide bv 9 tt long and slides on a heavy planed ironbed. 1 he table is power operated In- a heavy screw capableof and accurate adjustment from both sides of the workSuitable are provided for clamping the work or Milwaukee No. 25 Horizontal Drill Driven by S-Hp, Motor tures. All control levers are placed on the spindle carriacewithin convenient reach of the operator. Small Pneumatic Hand Drilling Machine FOR drilling staybolt telltale holes and other smallhole>, a drill developed by the Desoutter Brothers,Ltd., London, can be used to good advantage. Themachine, .shown in Fig. 1, is of novel design and takes the with torm of a cylinder 4 in. long bv 1 >4 in. diameterthe chuck protruding. It weighs only 1 lb. 14 az. and takesdrills up to 4 in. The tool is grasped in the juilm of thehand and the air sup],ly is controlled bv a jjress buttonin the head of tin- drill. Ihe motor consists of a block of
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
