. Railway mechanical engineer . n Machine with Compound Table Similar to tlie average modern upright drill, but the charac-teristics are entirely different. The gearing arrangements,frictions, feeds, quick return, etc., are similar in detail to 617 618 RAILWAY MECHANICAL ENGINIiER Vol. 93, No. 10 the corresponding parts wliich are being used un Fosdickheavy duty radial drills. The illustrations show the regular constant speed beltdriven machine with round table, and the variable speedmotor driven machine with comjjound table with micrometerdial adjustments and the vertical milling support. The
. Railway mechanical engineer . n Machine with Compound Table Similar to tlie average modern upright drill, but the charac-teristics are entirely different. The gearing arrangements,frictions, feeds, quick return, etc., are similar in detail to 617 618 RAILWAY MECHANICAL ENGINIiER Vol. 93, No. 10 the corresponding parts wliich are being used un Fosdickheavy duty radial drills. The illustrations show the regular constant speed beltdriven machine with round table, and the variable speedmotor driven machine with comjjound table with micrometerdial adjustments and the vertical milling support. Thesehave a capacity of 25 in. diameter of work and the weightis about 2,j50 lb., and they are driven by a 7J/.-hp. constantspeed motor. The Ijase of this machine is surrounded by a channeldraining to a large reservoir for drilling compound, and is sodesigned that bolts may be entered from either end of theT-slots. The table arm has an unusually long bearing on the col-umn and is internallv ribbed similar to a bridge or roof truss. Constant Speed Belt Driven Machine with Round Table which greatly increases the rigidity. The table is raisedand lowered from either side of the machine, may be swungaround the column to clear the Ijase for large work and can-not accidentally drop when undamped. The unique ar-rangement of the table T-slots allows them to terminate veryclose to the center, allows heavy ribs to run directly towardthe hub, permits work of any shape to be securely clampedand prevents bolts from flying out should they becomeloosened while drilling. The spindle head is raised and lowered by a handwheel,and not being burdened with the heavy feed ari-angement, isperfectly counterbalanced. The spindle is provided with adepth gage and automatic trip which may be set to gradu-ations in any position in the entire length, of travel. Asafety trip at the limit of traverse prevents spindle quick return acts instantly, requires but one hand to operate for sensitive drillin
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License: Licensed
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
