Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts . the socket a proper working fit to the spindle, after which the stud D remains in a fixed lock the spindle, the handle G is used, thus forming a neat and effective device. The Whiiworth Duplex Lathe.—Fig. 2590 is a cross-sectional view (through the slide-rest andshears) of a Whitworth duplex lathe with compound slide-rest. There are two slide-rests operatingupon the same carriage and moved by the same cross-feed screw, one being operated by a right-handed and the other by a
Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts . the socket a proper working fit to the spindle, after which the stud D remains in a fixed lock the spindle, the handle G is used, thus forming a neat and effective device. The Whiiworth Duplex Lathe.—Fig. 2590 is a cross-sectional view (through the slide-rest andshears) of a Whitworth duplex lathe with compound slide-rest. There are two slide-rests operatingupon the same carriage and moved by the same cross-feed screw, one being operated by a right-handed and the other by a left-handed screw, so that the two simultaneously approach or recedefrom the axial line of the lathe-centres when operated by the cross-feed screw. The turning tool forthe front slide-rest is placed in the usual manner, while that for the back one is turned upside down, the two tools, operating simultaneously, thus performing twice the quantity of work. A more im-portant advantage is, however, that the strain due to the depth of cut is taken off at one traverseof the slide-rest, and, being thus divided, may be made equal on the two sides; and therefore thework is not sprung by that strain, and may be turned more true than it could with a single is this the case with long square-threaded screws or long spindles. The adjustment ofthe tools to their respective cuts is made by operating the respective upper slides of the is usual, however, when the tools are first secured by the clamps, to set the front tool first andafterward adjust the rear one; and this is compulsory when the tools are not diametrically opposite,as in the case of screw-cutting; it being obvious that the tool which leads merely reduces the sizeof the work, while that which follows determines the finished 242 LATHE, METAL-WORKING. Lathe for Axl
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Keywords: ., bookauthorbenjaminpark18491922, bookcentury1800, bookdecade1880
