. Railway mechanical engineer . edfor diameter and taper by means of plug gages. A set of hollow-gages are also provided by which the turned bolts may be testedboth as to the correctness of size and taper. The bolts are fin- Four-Head Bolt Turning Macliine i,ine lathe, two center drills, and two nut facers. One of theillustrations shows a pile of rough bolts as received from thebolt header. They are first pointed in order that they willproperly enter the cutter head of the bolt turning machine. Muffactr Bot CuHf Lu a C=i !ZZ> Nuf Facer -* D spiral Onnder Bo!i Ali-erer \ CZ] Orinding Group o
. Railway mechanical engineer . edfor diameter and taper by means of plug gages. A set of hollow-gages are also provided by which the turned bolts may be testedboth as to the correctness of size and taper. The bolts are fin- Four-Head Bolt Turning Macliine i,ine lathe, two center drills, and two nut facers. One of theillustrations shows a pile of rough bolts as received from thebolt header. They are first pointed in order that they willproperly enter the cutter head of the bolt turning machine. Muffactr Bot CuHf Lu a C=i !ZZ> Nuf Facer -* D spiral Onnder Bo!i Ali-erer \ CZ] Orinding Group of Machine Tools for Finishing Engine Bolts ished with one cut, no roughing cut being the aver-age time required being less than one and one-half minutes foreach bolt. When all four heads are working a 1 in. by 12 is turned in one minute. Bolts with countersunk and counterbored heads are madefrom the standard stock hexagonal head engine bolts. Theseo]; are performed on the bolt altering machine which. Rough Bolts Ready to Be Pointed has two sliding heads operated by a hand lever giving a quickmovement of tools. By this means two apprentices are able tomore than keep ahead of special l)olt fitting. Bolts are cut ol¥ tokngth in this machine and threaded on the bolt cutter. AH Ijolt machines, except the two bolt lathes, are operated bycheai) labor, thus bringing the cost of bolt turning and fittinglo a niinimimi. Cactus .\s .\ Binder.—The United States Patent Office has re-cently granted a patent to F. Meyer, of Denver. Colo., on a newbinder for briquetting coal dust, coke breeze, flue dust and fineores. The binder is the liquid extract of cactus, and its wide oc-currence in all the southwestern states and its almost absolutenselessness for other purposes ought, according to the patentee,to furnish a binder cheaper than any other mentioned in (hevarious publications of the Bureau of Mines on the subject ofbriquetting of fuel. There can be no doubt th
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
