. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . y the tool-bars,which have a movement of 18 in. Chord Boring-jM(tc/iine.—Fig. 9 shows a ma-chine made by the Niles Tool Works for boringthe holes in bridge-chords and I-beams. Themachine is arranged with two indejiendent headson one bed. adjustable on the bed for varyinglengths. The bed may be made of any lengthto suit. The two heads are complete in them-selves, driven indepeiuleutly, and with all attachraents, feed
. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . y the tool-bars,which have a movement of 18 in. Chord Boring-jM(tc/iine.—Fig. 9 shows a ma-chine made by the Niles Tool Works for boringthe holes in bridge-chords and I-beams. Themachine is arranged with two indejiendent headson one bed. adjustable on the bed for varyinglengths. The bed may be made of any lengthto suit. The two heads are complete in them-selves, driven indepeiuleutly, and with all attachraents, feeds, etc., for a complete boring-nui-chine. The power is anijjle for boring four holes,punched 4 to 8 in. diameter, at one time, andthe range of speed is such as to adapt the ma-chine for drilling down to U-in. holes. Thetwo columns have both power and hand move-ment for adjustment on the bed. The headsliave 18 in. reach, boring to the center of 36 will take in under the cutter work 36 The spindle has 24 in. traverse. The range of work in length is from 5 to 50 ft. be-tween centers. The feeds are by power, and are reversible up or down, and range from -^ to. Fig. 7.—Brown & Sharpes chucking-machine.
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Keywords: ., bookcentury1800, bookdecade189, booksubjectmechanicalengineering
