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Title: |
1893 Article-Britannia Works, Radial Drill |
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Source: |
Cassier's Magazine Jan 1893, pgs. 229-231 |
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Insert Date: |
11/13/2012 9:08:05 PM |
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A drilling machine of special design, which is illustrated in figure 2, constructed at the Britannia Works, Colchester, England, was recently described in Engineering, of London. It has a heavy foundation table of box form, planed, with planed T slots on the top face and on each side. Mounted on the table is a turned column, carrying within it the vertical-driving shaft geared up with mitre gearing. Around the column there revolves a strong external column, accurately fitting it. The latter carries a radial arm made to rise and fall by sell-acting arrangement by power. Fitted to the arm is a saddle carrying the counterweighted drilling spindle, which can be driven by single or double gear. The spindle is fitted with self-acting feed motion by rack and pinion, with an engaging clutch. The horizontal-driving shaft fitted into the foundation bed carries a driving cone having five speeds, giving, with the double gear, ten changes of speed. The spur gearing is machine cut out of the solid, the smaller gears cut out of mild steel. The dimensions are as follows: Foundation bed, six feet four inches long by three feet two inches wide by two feet six inches high; the external rotating column, twelve inches in diameter; length of arm, six feet four inches; vertical traverse of arm, two feet four inches; drills through a maximum radius of five feet; drills out of the solid up to two inches in diameter; bores up to nine inches in diameter and twelve inches deep; the steel spindle is two and 0ne~half inches in diameter ; driving shafts, two and one-half inches in diameter ; bevel gearing, one and one- quarter inch pitch; machine-cut spur gearing, one inch pitch; speed cone, five speeds three and one-half inches wide; largest speed, seventeen inches in diameter; smallest, six inches in diameter; approximate weight, three and three-quarter tons. |
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1893 Britannia Works, Radial Drill
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