. American engineer . th will be equally suited for work where theteeth are on the side of the holder instead of on the circum-ference. Therefcre, by simply substituting a rotary cutterhead for the saw blade, a cold metal saw of this type becomesan efficient rotary planing machine or surface miller. It is then .■ for facing the eniis of large steel .and sim-ilar uork. 1 be of tile machine shown in llie illus-tration, wliicb is built by the Xewton Machine Toid Works,Philailelpbia, is indicated by tlie fact tliat it is capableof removing 1 ;4 tu. in. of metal
. American engineer . th will be equally suited for work where theteeth are on the side of the holder instead of on the circum-ference. Therefcre, by simply substituting a rotary cutterhead for the saw blade, a cold metal saw of this type becomesan efficient rotary planing machine or surface miller. It is then .■ for facing the eniis of large steel .and sim-ilar uork. 1 be of tile machine shown in llie illus-tration, wliicb is built by the Xewton Machine Toid Works,Philailelpbia, is indicated by tlie fact tliat it is capableof removing 1 ;4 tu. in. of metal per horsepower per minutewhen sawing with a kerf only 9/16 in. in width. alsocapable of cutting off a 15-in. I-beam in two minutes. STAYBOLT DRILLING MACHINE Drilling tell-tale holes in has become a formidableoperation in many of the larger shops. While it is sometimesperformed after the staybolts are in place in the boiler, it seemsto lie considered better practice to drill them before their appli-. Semi-Automatic Machine for Drilling Staybolts. cation. To drill tach one separately is expensive unless it canbe performed at the same some other operation on thebolt is under way. This phn is generally not feasible, and asemi-autoiratic machine has been designed which will permit
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroa, bookyear1912
