. American engineer and railroad journal . t the latter should be faced off for a smoothand even bearing on the head. Then, to avoid the loss of timeand the wearing of the threads incident to the screwing of along bolt through the sheet, the thread is cut away betweenthe working points, as shown on the bolt that is in positionon the machine. The thread is cut for the whole length ofthe bolt, and the die is followed by a tool that removes thethread. In general appearance this machine resembles a light latherather than the usual type of bolt cutter. The thread on thebolt is cut by open dies on t
. American engineer and railroad journal . t the latter should be faced off for a smoothand even bearing on the head. Then, to avoid the loss of timeand the wearing of the threads incident to the screwing of along bolt through the sheet, the thread is cut away betweenthe working points, as shown on the bolt that is in positionon the machine. The thread is cut for the whole length ofthe bolt, and the die is followed by a tool that removes thethread. In general appearance this machine resembles a light latherather than the usual type of bolt cutter. The thread on thebolt is cut by open dies on the carriage, and in order to takethe strain off from the thread and dies while the work is beingdone, the carriage is fed by a lead screw driven by the gear-ing shown at the end of the headstock. The tool for removingthe threads is back of the dies, and is fed in against a stop, sothat it just faces off down to the bottom of the threads. At-tached to the headstock is a carriage with a cross-feed that CLASS. A. (SI to 70) CLASS. A.(bo etc).
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
