. Railway mechanical engineer . ovided,ranging from .6 in. to 22.,? in. per minute. Each feed screwis provided with a graduated dial reading to thousandthsof an inch and readily set back to zero. All feeds areequipped with six trips and the table can be stopped atany desired position along its travel. • The vertical milling attachment illustrated is made inthree sizes, and clamped to the column dove-tail, no de-pendence being placed on the over-arm. The heavy patterntype has the same diameter spindle and the same bronzebearing as spindle. The taper hole face plateand driving keys also
. Railway mechanical engineer . ovided,ranging from .6 in. to 22.,? in. per minute. Each feed screwis provided with a graduated dial reading to thousandthsof an inch and readily set back to zero. All feeds areequipped with six trips and the table can be stopped atany desired position along its travel. • The vertical milling attachment illustrated is made inthree sizes, and clamped to the column dove-tail, no de-pendence being placed on the over-arm. The heavy patterntype has the same diameter spindle and the same bronzebearing as spindle. The taper hole face plateand driving keys also are the same, permitting as heavy a 176 RAILWAY MECHANICAL ENGINEER Vol. 94, No. 3 cut to be taken as on the horizontal spindle. This is aparticularly important feature. The drive is effected by alarge aluminum bronze gear, bolted to the face plate ofthe main spindle and driven by the cross key. In return itengages a steel gear on a horizontal shaft, driving the ver-tical spindle through a set of bevel gears. This allows the. Vertical Milling Attachment of Semi-Universal Type spindle to be set at any angle parallel to the face of thecolumn. A draw bolt is furnished. The longitudinal movement of the table is 35 in., with across movement of 14->^ in. and vertical movement of 20 machine is driven at a constant pulley speed of , requiring a motor of from 5 to 7^/$ rated horsepower. MEDIUM SIZED BORING MILLS With an appreciation of the need of a boring mill totake heavy cuts on medium and small sized work, the Cin-cinnati Planer Company, Cincinnati, Ohio, has recentlyadded to its line of boring mills a new machine built in42 in. and 48 in. sizes, one of which is shown in the illus-tration. are high production machines, built to takeheavy cuts at high spcecl. They have a capacity of twoinches over the rated size, and take 39 in. under the toolholder. The table is driven by a large, accurately planed bevelgear. The large bevel pinion which meshes into it h
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
