. Railway age gazette . ap-proximately ten times faster than the old method which was to Fig. 15—Drilling Jig for Peg Slab Milling Cutters Fig. 14 shows a gang of high speed slitting saws on a Cincin-nati miller which accurately saws ten high speed blades 5/32 Ys, in. by 3 in. in one operation, producing 250 pieces in a dayof nine hours. These blades are used in manufacturing insertedblade rose reamers, the bodies of which are machinery steel. Thecost of cutting one set of eight blades is Zyi cents. Fig. IS shows a drilling jig in which we drill and ream bodiesfor inserted peg slab milli
. Railway age gazette . ap-proximately ten times faster than the old method which was to Fig. 15—Drilling Jig for Peg Slab Milling Cutters Fig. 14 shows a gang of high speed slitting saws on a Cincin-nati miller which accurately saws ten high speed blades 5/32 Ys, in. by 3 in. in one operation, producing 250 pieces in a dayof nine hours. These blades are used in manufacturing insertedblade rose reamers, the bodies of which are machinery steel. Thecost of cutting one set of eight blades is Zyi cents. Fig. IS shows a drilling jig in which we drill and ream bodiesfor inserted peg slab milling cutters. Cutters produced on thisjig are undercut ten degrees and have all the characteristics of amodern milling cutter. We use this style of cutters on a rodmilling machine on which it is a common practice to take a cutYi in. in depth, 8 in. in width at 8-in. table travel per minute, thesteel being of 75,000-lb. tensile strength. A dowell pin is placed ineach peg to prevent it from turning under pressure from the. Fig. !(—High Speed Slitting Saws IVIaking Rose Reamer Blades place them on centers and mill one side at a time by revolvingthe dividing head. We straddle mill the squares on washoutplug taps and reamers at greatly reduced costs. Our method isto rough turn the material in the turret machine and clamp in aV-block on the milling machine. Fig. 11 illustrates a cutter used in making alligator wrenchesand also a straight shank side mill. The chuck for holding thismill is shown in Fig. 12. It is made in the tool room and is usedfor a number of purposes. By its use considerable high speed Fig. 16—Group of Tool Room Milling Cutters work. The teeth for these cutters are machined complete inaccurate jigs and when driven in place the dowell pin serves tobring the cutting edges in perfect alignment. The cutter shownwas manufactured complete by unskilled workmen and exempli-fies what can be accomplished by introducing modern methods inrailway shops. Fig. 16 shows a group
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroa, bookyear1913
