. Railway mechanical engineer . iveled to a vertical posi-tion and the heated band slipped in place. After this op-eration the spring is swiveled back to the horizontal position,the movable jaws swung into place, and suitable blocks ap-plied depending upon the spring size. Pressure is appliedto the air cylinders and the heated band firmly pressed aroundthe spring leaves in the usual manner. Crosshead Babbitting Devices Eliminate Machining It is a general practice to take up wear and maintain cross-head gibs to standard dimensions by babbitting. In mostcases a mandrel of some nature is used and
. Railway mechanical engineer . iveled to a vertical posi-tion and the heated band slipped in place. After this op-eration the spring is swiveled back to the horizontal position,the movable jaws swung into place, and suitable blocks ap-plied depending upon the spring size. Pressure is appliedto the air cylinders and the heated band firmly pressed aroundthe spring leaves in the usual manner. Crosshead Babbitting Devices Eliminate Machining It is a general practice to take up wear and maintain cross-head gibs to standard dimensions by babbitting. In mostcases a mandrel of some nature is used and sufficient babbittis poured into the gib to permit of machining it to the properwidth and thickness. This involves two distinct operationsand requires considerably more time than would be neededif just the right amount of babbitt could be put on in thefirst place and no machining was necessary. In order to _ i4r- HE: i! r» E- fl^- Jl-fiix---------;--Ttl^j? ™fs$! Taper 4 in IZ each side-■ & 5 _z )—ti—\ _B ^ J—HFt. rr A-l B-l c-i A 14 B$ ri B 1? I4V 19V C 3S% izV 40% 0 19$ IS Z3 E 16 14V 19V F ¥ *V z% G 9% s\ 10% Fig. 1—Details of Fixture Used In Babbitting Alligator Crosshead Gibs save the time ordinarily required for machining, a largerailroad system has developed the series of interesting andingenious jigs and mandrels described in this article. Alligator Type Crosshead Details of the fixture used for babbitting alligator cross-head gibs are shown in Fig. 1 and the actual operation ofpouring in Fig. 2. Referring to Fig. 1, the operation of thedevice will be practically self-evident. Three fixtures areprovided for three types of alligator crossheads of variouswidths of guides and distances between guides. The threeclasses have been designated A-l, B-l and C-l for purposesof identification. The crossheads are preheated by lowering them into themolten babbitt. On removal from the babbitt, they arecleaned of all surplus babbitt and dirt, being placed on themandrel r
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
