. Appleton's dictionary of machines, mechanics, engine-work, and engineering. nut-tapping end, and Fig. 3470 is a similar view of the bolt-screwing end. The frame-work of the ma-chine A A, and the sole-plate B B, are cast in one piece. The driving-cone C is supported by the up-right frames near the centre of the machine, and carries a pinion D, of 15 teeth, which geers with thewheel E, of 56 teeth, keyed on the smaller screwing-spindle F; thus the relative speeds of the driving-cone and the spindle F are as 3-7 3 to 1. The spindle F again carries a pinion G of 18 teeth, geering TOOLS. 7
. Appleton's dictionary of machines, mechanics, engine-work, and engineering. nut-tapping end, and Fig. 3470 is a similar view of the bolt-screwing end. The frame-work of the ma-chine A A, and the sole-plate B B, are cast in one piece. The driving-cone C is supported by the up-right frames near the centre of the machine, and carries a pinion D, of 15 teeth, which geers with thewheel E, of 56 teeth, keyed on the smaller screwing-spindle F; thus the relative speeds of the driving-cone and the spindle F are as 3-7 3 to 1. The spindle F again carries a pinion G of 18 teeth, geering TOOLS. 749 with the wheel H of 72 teeth, keyed on the larger screwing-spindle I, the ratio of speed in thiscase being as 4 to 1. In the end view the chucks KK are shown with square recesses, for thepurpose of receiving the heads of taps for tapping-nuts. In the view of the contrary or bolt-screwingend, the chucks L L are provided with plates grooved for the purpose of receiving the screwing-dies,which are adjusted by means of two set-screws, which press against, the backs of the dies so
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Keywords: ., bookcentury1800, booksubjectmechanicalengineering, bookyear1861
