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Title: |
1881 Article-Christiana Machine Co., Boring & Turning Mill |
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Source: |
American Machinist 22 Jan 1881 pg 1 |
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Insert Date: |
4/10/2012 9:12:44 PM |
New Boring & Turning Mill.
In the machine represented by the engraving on this page, the bed or main casting, as will be seen, is made in the best form to insure strength, besides being well braced. It has a capacity for work 8 feet 8 inches in diameter, and 4 feet 6 inches high. The face plate is six feet in diameter, is very heavy, and turns on a center shaft 10 inches in diameter, 4 feet long, having a long, heavy babbitted box and steel toe and step. By a neat device it may be conveniently lifted off its annular bearing. In work like boring pulleys, or turning small pieces, this feature will be found specially advantageous. All the driving shafts are of steel, and motion is communicated from them to the face plate by internal spur gearing. The heavy cross bar is raised and lowered by power, and has two heads working automatically and independently in all directions, each being provided with a separate set of feed gearing, and having a convenient arrangement for reversing motion. The feed, which varies from 1/16 inch to 5/8 inch, can be changed instantly. The tool slides, which are hexagonal, are forged wrought iron, with wrought iron-cut racks, and steel pinions. They have 30-inch traverse, with rapid hand motion, and are counterbalanced. The cast steel tool holders are fitted to slides with taper and key, and admit of tools being turned in any desired direction. They are readily taken out and boring bar substituted, of which two are furnished with each mil). The general finish of the ma chine is in accordance with the best shop practice. The wearing surfaces are all scraped, nuts and other small parts case hardened, and the back gearing (which is large and heavy) cut from the solid. The cones have five changes for a four-inch belt, which, with gearing, gives ten changes on the face plate.
The machine weighs about 22,000 pounds. It is built by the Christiana Machine Company, Christiana, Pa. |
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1881 Christiana Machine Co., Boring & Turning Mill
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