Flather New Patent
Screw Cutting Engine Lathes



General Description of the 
Flather New Patent Screw Cutting Engine Lathes

     The cut above represents the new pattern Lathe, built by Flather & Co., Nashua, N.H. It has been very carefully designed to meet the demand for a strictly first-class tool, capable of doing the finest work, and stiff enough to take rapidly and accurately the heaviest cut that can be put on this size machine.
     This lathe is made to gauges, and its parts are interchangeable. The head stock has hard hammered steel spindle, and the bearings on spindle are ground perfectly true. They run in hard bronze boxes, which can be renewed at anytime and be true with the rest of the Lathe. The carriage and tool slides have unusually long bearings. The screw and rod, which are of steel, are in front of the Lathe, and both run in the same casting. A short shaft, on which is mounted the feed cone and gears, is fitted in the long bearing in front of Lathe. The shaft is held in position by a gear on one side and steel clutch on the other. The shaft has a hole chucked into it 3 inches deep, and forms a bearing for the feed rod, which is telescoped into and revolves freely in it. On the feed rod is a clutch to interlock with clutch on short shaft when in use. The screw is fitted in upper hole of same casting, and is connected when in use by slip gear to the gear on short shaft, as shown in cut. The rod connects with feedworks in the apron by the usual friction feed, and the screw by open and shut nut, operated by a cam. The advantages of this method of connecting feed rod and screw are: it is more compact, the operator has better control of the feed, and it can be changed from belt to gear feed instantly, or from fine feed to coarse, or the reverse, quickly. In squaring up work with power cross feed, after taking a roughing cut with the belt feed, the gear feed can be thrown in, and a finishing cut from the finest up to 3/8 inch per revolution can be taken. The same difference can be made with longitudinal feed; also a difference 3 to 1 can be made instantly in the feed by loosening the friction feed and feeding with screw. All actuating screws are of steel, also all small gears and studs. All nuts, wrenches, and screws are case-hardened.

Every Lathe is run and carefully tested before leaving the works.


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