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American Protective Tariff League

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The Iron Age 1889-03-21: Vol 43

1889 Reed Business Information US

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‘THE TuHurspay, MARCH 21, 1889. IRON AGE Automatic Vertical Tapping | are suitable for 3, 1, 14 or 2 inch. On Machine. | the driving shaft is a beveled pinion which | drives a vertical shaft in the center of the The accompanying engravings show a/column. On the lower end of this shaft, vertical‘ tapping machine, designed for| just below the beveled gear, is a pinion tapping nuts from } inch up to 2 inches, | which meshes with a large spur-wheel or larger, if desired. The machine is made | shown plainly under the bed-plate of the by the National Machinery Company, of | machine in the sectional view. This large Tiffin, Ohio. They are made in the form! wheel is secured to a vertical shaft, which a sufficient end motion of the tap spindles to raise the taps out of the nuts, and also to allow them to tap clear through the nuts. At the upper end of each of the tap spindles is a 3-inch pitch double- threaded screw, surmounted by a disk, which is loose on the spindle. On top of the central column is asleeve, which is prevented from rotating with the column AUTOMATIC VERTICAL TAPPING MACAHINE, BUILT BY THE NATIONAL MACHINERY COMPANY, illustrated in order to do away with the | carries anothe…

Citation

The Iron Age 1889-03-21: Vol 43. Reed Business Information US. 1889.