. Railway master mechanic [microform] . , motordrive or cone drive. When motor drive is applied to the con-stant speed box, constant speed motors are used and the speedvariations are all made in the box. Attention is called to the constant speed drive which is fittedwith long shafts, long bearings all of which are bronze bushedand run in oil and are non-clogging. The gears are all steeland also run in oil. The speed changes in this box are 12 innumber and reverse for running the spindle in either direction. The heavy back gear drive is applied close up to the frontmain bearing of the spindle.
. Railway master mechanic [microform] . , motordrive or cone drive. When motor drive is applied to the con-stant speed box, constant speed motors are used and the speedvariations are all made in the box. Attention is called to the constant speed drive which is fittedwith long shafts, long bearings all of which are bronze bushedand run in oil and are non-clogging. The gears are all steeland also run in oil. The speed changes in this box are 12 innumber and reverse for running the spindle in either direction. The heavy back gear drive is applied close up to the frontmain bearing of the spindle. This box gives two changes ofspeeds which are suitable for boring and facing with flat cutterswhich are the most common and frequent operations. Startingand stopping the spindle is also done by this one lever whichis handy to the operator. A friction clutch is not used for starting the machine orstopping it, but the transmitter gear is thrown out, leaving allparts at rest except the constant speed shaft which simply spinsaround in Universal Boring, Driling and Milling Machine. Built by , Franklin. Pa. ;!i RAILWAY MASTER MECHANIC February, L909 The feed box is fitted with steel gears which gives feeds fin<enough for the most delicate- tools. It also has strength andpower to drive cuts milling or boring up to ^ - in. feeds to oxuturn of the spindle. The over arm has long been considered indispensable in mill-ing. As applied in boring on this machine it makes it possibhin long spans, where a number of holes are to be bored in line,to support the bar in the center. This permits of the usseveral cutters at one time, and overcomes the. disagreeable fea-ture of chatter which is more or less attendant with the use oflong bars. It will also supply the place of many special fixtures and in use is readily appreciated. I he universal machine is titled with compensating drivinghead which not only takes up the looseness which will come inthe bar, hut also by the use of coll
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License: Licensed
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishernewyo, bookyear1895
