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Title: |
1911 Article-American Tool Works Co., Universal Radial Drill |
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Source: |
Machine Tools Commonly Employed In Modern Engineering Workshop, V2, 1911, pgs. 29-30 |
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Insert Date: |
5/2/2020 8:31:23 PM |
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A full universal radial drill, by the American Tool Works Company, is illustrated in fig. 254. To enable the drill to deal with holes inclined in any direction, the saddle has a circular seating, upon which the spindle carrier can be swiveled, and, in addition, the radial arm can be rotated about its axis, a worm and worm-wheel arrangement being provide for the purpose. One spindle serves for both drilling and tapping operations, and the tapping attachment is carried on the head, between the usual double gears and the speed-box, thus giving the friction clutches the benefit of the double-gear ratio. By means of this attachment the spindle can be started, stopped, or reversed without stopping the machine, and all the operating handles are grouped near the front within convenient reach of the attendant. For tapping operations, the double gearing is engaged and then disengaged to reverse the motion of the tap, which thus returns at a much higher speed. Any type of drive can be provided, but in the arrangement illustrated the speed-box is of the geared-friction type giving four speed changes. |
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1911 American Tool Works Co., Universal Radial Drill
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