. Railway mechanical engineer . d for the pin brasses in the main rods andthe knuckle jaw in the side rods. Plans are now beingdeveloped to cut out the back end of the main rod and the finished. Thus from each frame an average of 487 lb. ofmetal was removed in an average of about 5 hrs. and 9 rain,from the time the work was started until it was finished. MILLING M.«N ROD While the main rod Ijrasses are planed for the rod fit andliored for the [lin, the milling machine plays an interesting June, 1917 RAILWAY MECHANICAL ENGIXEER 313 part in tlie work done on them. The finishing of the
. Railway mechanical engineer . d for the pin brasses in the main rods andthe knuckle jaw in the side rods. Plans are now beingdeveloped to cut out the back end of the main rod and the finished. Thus from each frame an average of 487 lb. ofmetal was removed in an average of about 5 hrs. and 9 rain,from the time the work was started until it was finished. MILLING M.«N ROD While the main rod Ijrasses are planed for the rod fit andliored for the [lin, the milling machine plays an interesting June, 1917 RAILWAY MECHANICAL ENGIXEER 313 part in tlie work done on them. The finishing of the brassesafter the\ ha\e been planed and Ijored involves tlie cuttingof the inside corners, making the hard grease and oil grooves,roundint; the corners of the flanges and cutting one flange ners are cut with an end milling cutter (Fig. 13) with the jigshown at the left in Fig. 12. The hard grease groove is madewith a small end milling cutter as shown in Fig. 14. The oilgrooves are made with a saw fitted on a taper shank and set. 1 L i- nliii ^ iM ! ... Il^ ■-—- I ■*^^B^^^B- K 1 Fig. 13—Milling the Inside Corners of the Main Rod Brasses away to clear the rod ke}- set screws. This work was previ-ously done as follows: The inside comers were cut on ashaper; the hard grease grooves were made on a slotter afterholes at each end of the groove had been drilled on a drill Fig. 15—Milling the Oil Grooves in the Main Rod Brasses in the spindle of the machine, as shown in Fig. 15. The jigshown at the right in Fig. 12 is used for holding the brass
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
