. American engineer and railroad journal . smaller one taking from % to 2 in. pipe and weighing, withthe dies, about 135 lbs. The largest size cuts and threads pipefrom I to 6 in. in diameter, and weighs about 1,250 lbs. Thesemachines may also be used for threading bolts, the one shownin Fig. 2 taking bolts from Y2 to \l/i in. in diameter. The pipe is gripped in a powerful self-centering vise which forthe two smallest sizes may be screwed to a post, bench, or anytemporary support, and with the larger sizes is permanently. fig. 2. built in the stand of the machine. The vise handle is arrangedto
. American engineer and railroad journal . smaller one taking from % to 2 in. pipe and weighing, withthe dies, about 135 lbs. The largest size cuts and threads pipefrom I to 6 in. in diameter, and weighs about 1,250 lbs. Thesemachines may also be used for threading bolts, the one shownin Fig. 2 taking bolts from Y2 to \l/i in. in diameter. The pipe is gripped in a powerful self-centering vise which forthe two smallest sizes may be screwed to a post, bench, or anytemporary support, and with the larger sizes is permanently. fig. 2. built in the stand of the machine. The vise handle is arrangedto be out of the way of the operator when threading or cutting,and yet be convenient when it is needed. In front of the vise isthe die head carrying a machine counterpart of the Armstrongadjustable stock for hand threading, the die being divided intofrom two to eight sections, depending upon the size of the the two-part dies adjustment is made by individual end screwsbut in the larger sizes the die sections are moved simultaneously,like the jaws of a lathe chuck, by turning a single screw. Thedies used are of the Armstrong make, with their characteristicadjustable features and double taper. They are furnished rightor left handed, for pipe or bolts, as may be desired. The die head has no gear teeth on the part coming in contactwith the shell, while a generous bearing insures firmness andlittle wear. The driving spindle is carried through the side and its end is squared in the smallest size and provided with a
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
