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Title: |
1911 Article-Jones, Pollard & Shipman, Ltd., Sensitive Radial Drill |
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Source: |
Machine Tools Commonly Employed In Modern Engineering Workshop, V2, 1911, pgs. 21-22 |
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Insert Date: |
4/19/2020 9:47:09 PM |
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For work of a comparatively small size, but too large for the ordinary sensitive vertical drill, Jones, Pollard & Shipman, Ltd., manufacture a small sensitive radial drill, illustrated in fig. 244. The work is mounted upon the table, and the drilling spindle can be moved radially along the arm, which can be rotated about the central column of the machine. In this way the drill can be set rapidly over any portion of the work within the limits of the capacity of the machine. As the name of the machine suggests, the spindle is belt-driven, the arrangement of the pulleys being such that the tightness of the belt is not affected either by the radial movement of the spindle or the swinging of the arm. When the arm is set in the required position it can be clamped by means of the binding handles shown at the side of the column, and the spindle head is moved along the arm by means of a rack-and-pinion gear, the handwheel of which is indicated. The spindle itself can be fed 4 in. by means of a hand lever, as in the ordinary sensitive drills already described, and although the arm has no vertical adjustment the spindle slide is adjustable through a vertical distance of 9 in. The working surface |
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1911 Jones, Pollard & Shipman, Ltd., Sensitive Radial Drill
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