. Railway mechanical engineer . izes of staybolts from lys-in. to l-;8-in. andof any length. One end of the sleeve has a plain hole andthe other end a threaded hole of the respective size of thebolt to be guided. The die heads used are known as theCook die head, manufactured by the Detrick & HarveyCompany, Baltimore, Md. This type of head is particu-larly adapted for the work. The left hand head is equippedwith plain cutters which convert it practically into a hollow-mill or box tool. The right hand head contains the thread-ing dies. The automatic knock off on the die heads is notused, because
. Railway mechanical engineer . izes of staybolts from lys-in. to l-;8-in. andof any length. One end of the sleeve has a plain hole andthe other end a threaded hole of the respective size of thebolt to be guided. The die heads used are known as theCook die head, manufactured by the Detrick & HarveyCompany, Baltimore, Md. This type of head is particu-larly adapted for the work. The left hand head is equippedwith plain cutters which convert it practically into a hollow-mill or box tool. The right hand head contains the thread-ing dies. The automatic knock off on the die heads is notused, because the recess under the button head of the boltis cup shaped and would not permit opening the ties before the bolt is Inicked out a little distance. This is the reasonfor the reversiljle drive. In operating the machine the bolt is placed in the float-ing holder shown in the left hand vise in Fig. 6. The topend of the rough bolt .1, Fig. 7 is entered in the guide sleevein the spindle; the die head is closed and the bolt is fed. Fig. 5—Automatic Valve Used with Flue Swager into the proper depth by hand, .\fter this operation, thebolt looks like B, Fig. 7. Next the bolt is placed in theright hand head in the same manner. The guide sleeve inthis spindle is threaded and can be adjusted so as to bringthe threads on Ijoth ends of the bolt in correct lead. The
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
