. Railway mechanical engineer . plant. The improvement ofgreatest importance in the design of this niadiine is the use ofthe herringbone driving gear instead of the usual type ofstraight toothed gear. The latlie is designed to turn wheelsfrom 28 in. to 42 in. in diameter on the tread and will take out-side journals up to 6^ in. in diameter. The opening in thespool is 10 in. wide and accommodates axles up to 91/2 in. indiameter; the maximum distance between centers is 94 in. The herringbone driving gear is mounted on a spool revolvingon large bearings in the bed of the machine. The ends of thes
. Railway mechanical engineer . plant. The improvement ofgreatest importance in the design of this niadiine is the use ofthe herringbone driving gear instead of the usual type ofstraight toothed gear. The latlie is designed to turn wheelsfrom 28 in. to 42 in. in diameter on the tread and will take out-side journals up to 6^ in. in diameter. The opening in thespool is 10 in. wide and accommodates axles up to 91/2 in. indiameter; the maximum distance between centers is 94 in. The herringbone driving gear is mounted on a spool revolvingon large bearings in the bed of the machine. The ends of thespool are the face plates which carry the drivers. The driving tile center. The tail stocks, by wliich the wheels are centered,arc moved on the bed and clamped to it by air cylinders, theoperating valves of which arc within easy reach of the face plate is equipped with three pairs of drivers en-gaging the inside of the wheel near its circumference. Thesearc tightened by hand and exert a uniform pressure against the. Back of the Ca Gap Ir Lathe Showing Automthe Herringbone Gear lly Operated wlieels. Independent chuck jaws on the tail stock faces engagetlie outside of the wheels and support them against the thrust ofthe drivers, relieving the axle of all deflection or torsionalstrains. The tool rests are equipped with pneumatic tool clamps whichenalile the ojierator to cliangc and clamp tools in a few seconds
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
