. The Street railway journal . are planed and mated, whenafter being bored out and turned down to the proper diam-eter, they are made ready for the gear cutting. Seven ofthe blanks are arranged on a shaft, as shown, with a temp-let or pattern wheel at the end. The bed plate carryingthe gears is then started and the blanks, passing under thecutters, are each cut to the proper depth for a line of finished the nest of gears is turned one notch byhand and fastened in place, when a second cut is made, andso on until finished. The pinions are cut in nests of six inthe same manner as descr
. The Street railway journal . are planed and mated, whenafter being bored out and turned down to the proper diam-eter, they are made ready for the gear cutting. Seven ofthe blanks are arranged on a shaft, as shown, with a temp-let or pattern wheel at the end. The bed plate carryingthe gears is then started and the blanks, passing under thecutters, are each cut to the proper depth for a line of finished the nest of gears is turned one notch byhand and fastened in place, when a second cut is made, andso on until finished. The pinions are cut in nests of six inthe same manner as described for the gears, only one at-tendant being required for the two machines. In theoperation a pump forces the lubricating mixture in quite a eter is first employed, and this is followed by a secondabout 2\ ins. in diameter, and when sufficient depth isdrilled, a section forming a single blank is cut off on thelathe. Fig. 3 illustrates a keyway cutting device for cutting thekeyway in the gears. This is a home-made machine, the. FIG. 2.—DRILLING AND CUTTING PINION BLANKS FROM HOTROLLED BAR frame work being constructed of two steel flat bars, thesame as employed for grip slides on the grip cars. Thegear is placed at one end of the machine, as shown, whereit is held in position when the shaft or bar carrying ten cut-ting knives, which are placed 4 ins. apart, is forced endwisethrough the bore of the gear. Each of these knives is of
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
