. Railway mechanical engineer . its top to the ram. Thecross-rail is long and deep and is elevated by means of atelescopic screw provided with a ball bearing thrust. Onegib is provided with an angular rear face, so that the cross-rail is always kept square with the column. The cross-rail isprovided with automatic cross feed in either direction andthe cross feed screw has a micrometer collar. The cross slide has an extra large bearing surface on thecross-rail. The vise is clamped to the table and revolves upona graduated index plate which is keyed to the table. Bymeans of an index pin it can be
. Railway mechanical engineer . its top to the ram. Thecross-rail is long and deep and is elevated by means of atelescopic screw provided with a ball bearing thrust. Onegib is provided with an angular rear face, so that the cross-rail is always kept square with the column. The cross-rail isprovided with automatic cross feed in either direction andthe cross feed screw has a micrometer collar. The cross slide has an extra large bearing surface on thecross-rail. The vise is clamped to the table and revolves upona graduated index plate which is keyed to the table. Bymeans of an index pin it can be readily locked at riglit anglesor parallel wdth the ram. The vise jaws are lined with steeland provided with a tension screw. The crank gears aremade with large pitches and wide faces. The stroke arm isconnected to the ram by means of a link, providing amplespace to allow a 4-in. shaft to pass entirely through thecolumn for keyseating or any other similar operation. Thestroke is varied from a convenient point and adjustment is. Springfield 20-iii. Crank Shaper possible while the machine is in motion. Eight speeds areprovided and the number of strokes per minute varies from7 to 129. The machine occupies a floor space of 56 in. by136 in. and weighs 4,850 lb. DOUBLE UTILITY TOOL FOR BOILER TUBES THE self-feeding flue expander illustrated is designed tofinish the job by flaring the end of the flue Ijeforethe expander is withdrawn; it saves the time requiredfor flaring with an additional tool in a different the expander has been inserted into the flue to the pointof the flaring part of the flaring roller, the mandrel is turnedto the right and the flue is rolled tight in the sheet. To ob- This tool is known as the locomotive superheater expanderand is made in several sizes, for 43/S-in., 454-in., 5-in. andSJ/i-in. flues, by the J. Faessler Manufacturing Company,Moberly, Mo., who also manufacture a similar tool forlocomotive arch tubes and water tube boiler flues. The
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
