. Railway mechanical engineer . Fig. A—Magnetic Ciiuck Facilitates Holding Retaining RingSegments machine table in Fig. 4 ready for grinding. They are ap-proximately 21 in. by 2J-^ in. by 5-^ in., being received roughfrom the blacksmith shop, where they are bent to the re-quired arc to fit the driving wheel center with which theyare used. Both sides of the segments are ground, approxi-mately 1/16 in. of metal being removed from each side, orenough to clean up the surfaces. About 27 segments can be. Fig. 5—Main Rod Keys Being Dressed for Further Use ground per hour depending upon tlieir size an
. Railway mechanical engineer . Fig. A—Magnetic Ciiuck Facilitates Holding Retaining RingSegments machine table in Fig. 4 ready for grinding. They are ap-proximately 21 in. by 2J-^ in. by 5-^ in., being received roughfrom the blacksmith shop, where they are bent to the re-quired arc to fit the driving wheel center with which theyare used. Both sides of the segments are ground, approxi-mately 1/16 in. of metal being removed from each side, orenough to clean up the surfaces. About 27 segments can be. Fig. 5—Main Rod Keys Being Dressed for Further Use ground per hour depending upon tlieir size and the numberthat can be placed on the chuck of the grinding machine. Miscellaneous Grinding Main rod keys can be forged or roughed out from barstock with heavy feeds and finished on the grinding keys are made in many different sizes, being groundon two sides and approximately 1/16 in. of metal removedfrom each side. An allowance of plus or minus .01 in. isadhered to for this work and while tliis limit may seem un-necessarily close it can be obtained without slowing down theproduction of the machine and will result in better fittingkevs. With 12-in. kevs 1^4 in. thick, and having a taper February. 1922 RAILWAY MECHANICAL ENGIXEER 97 of 252 in. to l}^ in., 06 keys can be ground per hour. With10-in. keys, J^ in. thick and having a taper of 3 in. to 2^in., the production is 30 per hour. Worn main rod keyscan also be dressed as shewn in Fig. 5 and made ready foruse again. For thi
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
