. American engineer and railroad journal . determine for itself the most suitable rates of cutting speedfor its conditions. The machine tool operator should then befurnished with data as to the cutting speed in feet per minuteto be used with various materials. It is then necessary to furnish him with some simple (to beeffective it must be quite simple) means of determining theproper position of the belt and arrangement of back gearson a belt-driven lathe, or of the controller handle and gearingon a motor-driven lathe to obtain the desired rate of cuttingspeed on the diameter of work he is to t
. American engineer and railroad journal . determine for itself the most suitable rates of cutting speedfor its conditions. The machine tool operator should then befurnished with data as to the cutting speed in feet per minuteto be used with various materials. It is then necessary to furnish him with some simple (to beeffective it must be quite simple) means of determining theproper position of the belt and arrangement of back gearson a belt-driven lathe, or of the controller handle and gearingon a motor-driven lathe to obtain the desired rate of cuttingspeed on the diameter of work he is to turn. furnished by the controller there are four runs of gearing,so that a very huge number of speeds are available. Theletters with each controller point number designate the runof gearing which is to be used; F, means the fastest run;MR. medium fast; , medium slow and S. slow. Thissame scheme can easily be adapted for use with boring millsand drilling table was made up by the machine shop foreman from CONTROLLER POINTS. CUTTING SFEED FT. PER —DIAGRAM SHOWING MOTOR CONTROLLER POINT FOR ANYCUTTING SPEED ON VARIOUS DIAMETERS OF WORK. Diameter of Work. Cutting Speed—Feet Per Minute. , s- !.—17I.—16S—141.—14 . M —14 — 9 —19 —14 —12 —11 — 9 S.—21 8—20 8.—19 8.—18 8—17 8.—16 F—10 —16 —11 —20 MS—18 —16 —14 —12 MS.—11 — 9 MS.— 8 S.—20 S—19 S.—18 \l F \i s M S M 60 F————11 — —————13\l ; —11M S—— — 8S.—20 6G F.—15M F.——15\1 [•• t^— 9M S.———————12MS.—11M S.—— 9 S.—21 70 F.————13
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
