. Railway mechanical engineer . ly a long cutting life aswell as smooth production. A cross feed movement is alsoprovided so as to make possible the use of the full face ofthe grinding wheel. This is also used for truing the grind-ing wheel. The machine is being built in two sizes, one size to grinddrills from 1/16 in. to \l/2 in. diameter, and the other togrind drills from l/2 in. to 3 in. in diameter. Drive is bymeans of a suitable motor with a two step pulley so as toobtain the necessary peripheral speed of the grinding special request the machine can be easily arranged forcounter
. Railway mechanical engineer . ly a long cutting life aswell as smooth production. A cross feed movement is alsoprovided so as to make possible the use of the full face ofthe grinding wheel. This is also used for truing the grind-ing wheel. The machine is being built in two sizes, one size to grinddrills from 1/16 in. to \l/2 in. diameter, and the other togrind drills from l/2 in. to 3 in. in diameter. Drive is bymeans of a suitable motor with a two step pulley so as toobtain the necessary peripheral speed of the grinding special request the machine can be easily arranged forcountershaft drive. The great importance of a properly sharpened drill haslong been realized and the drill manufacturers have alwaysstood ready to afford the user of drills all possible informationconcerning the proper clearance and angle of the drill and correct methods of sharpening. As a matter of fact, a drillnot properly sharpened will not only ruin the drill itself, butwill cause all kinds of unnecessary expense such as breakage. Twist Drill Grinder, Semi-Automatic in Action of machinery, wear of jigs and loss due to spoiled machineparts which must be sent to the scrap heap. Convenient and Durable Bench Vises IN the latest design of bench vises manufactured by theCharles Parker Company, Meriden, Conn., every efforthas been made to produce a strongly made vise andone which will be convenient to use on account of the abilityto swivel it at any required angle independent of previouslydetermined, angular stop positions. The new vise in the
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
