. American engineer and railroad journal . MACHINE NO. 2l. For radiator steam coil works, etc., and other serviceswhere the greater number of pipes are of comparatively short lengths, this will be found a particularly desirable amuse-ment. The dies and cutting-ofi tool are held stationary, andare opened and closed by means of a double-geared crank-handle, as shown, Expanding dies are used in connectionwith a self-centring and powerful gripping chuck, insuringspeed in cutting off and threading a pipe. They arc furnishedto thread from 1 in. to 4 in. inclusive. Quick interchangeability of the var
. American engineer and railroad journal . MACHINE NO. 2l. For radiator steam coil works, etc., and other serviceswhere the greater number of pipes are of comparatively short lengths, this will be found a particularly desirable amuse-ment. The dies and cutting-ofi tool are held stationary, andare opened and closed by means of a double-geared crank-handle, as shown, Expanding dies are used in connectionwith a self-centring and powerful gripping chuck, insuringspeed in cutting off and threading a pipe. They arc furnishedto thread from 1 in. to 4 in. inclusive. Quick interchangeability of the various sizes of dies, coupledwith a construction which permits of separate adjustment forthree different sizes, enables the operator to thread pipe tosuit all variations in ordinary fittings, and to open and closethe dies any number of times without changing the adjust-ment. Again, either of the sizes may be used alternatelywithout change of adjustment, or the dies may he quicklytaken out to permit of the free passage of the pipe to be cut. ARMSTRONG PIPE-THREADING AND1CUTTING OFF MACHINE. off, and the adjustment still remain unchanged. An objec-tion frequently raised against machines using expanding diesis, Our men are not skilful enough to use expanding dieswithout threading some of the pipe too large and some of ittoo small. This has been met and successfully overcome in the toolhere shown. Though the dies are quickly opened afterthreading a piece of pipe, yet they may be as quickly closedtogether again without the least, danger of variation, unlessintentional. The weight of this machine is about 700 lbs.; with counter-shaft, 850 lbs. Speed of counter-shaft should be about 835revolutions a minute. Steam-kitters and others having to do with the cuttingand threading of pipe will find in this machine a most con-venient tool built for their especial line of work. It is animproved form of the No. 2 pipe threading and cutting-offmachine for hand or power, built by the Armstrong Manu
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
