. American engineer and railroad journal . OPERATING SIDE OF VERTICAL MILLING REAR SIDE OF WORM-DRIVEN VERTICAL MILLING MMlllXIMil.[CATION OF MOTOR DRIVE. ished surface for convenience in setting thework and also to support a bearing for thelower end of the spindle, as shown in one ofthe photographs. There are nine changes of feed; a fast tra-verse is provided for all movements. Thepower wliich drives the feed and the fasttraverse is transmitted from the pulley at theend of the intermediate driving shaft to thepulley at the right of the feed box. The di-rection of the feed is reverse
. American engineer and railroad journal . OPERATING SIDE OF VERTICAL MILLING REAR SIDE OF WORM-DRIVEN VERTICAL MILLING MMlllXIMil.[CATION OF MOTOR DRIVE. ished surface for convenience in setting thework and also to support a bearing for thelower end of the spindle, as shown in one ofthe photographs. There are nine changes of feed; a fast tra-verse is provided for all movements. Thepower wliich drives the feed and the fasttraverse is transmitted from the pulley at theend of the intermediate driving shaft to thepulley at the right of the feed box. The di-rection of the feed is reversed by tumblergears. The motion for the fast traverse is ob-tained by engaging a friction clutch. With thehigh speed gears in mesh across and in andout feeds are obtained from .0052 to .0526 revolution of the spindle. With the lowspeed gears in mesh feeds from .0121 to .1274in. per revolution of the spindle are obtained;the corresponding circular feeds on a 10 are from .0063 to .0706 and from .0148to .1649. The circular table is 42 in. in diameter overthe T slots and
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
