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Title: |
1895 Article-Bullard Machine Tool Co., Vertical Boring Machine |
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Source: |
Modern Mechanism 1895 pgs 79-80 |
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Insert Date: |
6/7/2011 9:17:38 PM |
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Bullard's Boring and Turning Mill.—Fig. 8 shows a boring and turning mill made by the Bridgeport (Conn.) Machine-Tool Works. It is provided with a turret-head. Its capacity is 38 in. in diameter and 27 in. in height. The table is 36½ in. in diameter and has twenty changes of speed. The feed is by belt and has 4 changes. The turret-head is square in form, 10 in. in diameter, with four 24 in. holes. It will unlock automatically at any point, and is revolved by hand. The turret-slide can be set to bore or turn at any angle, and has a movement of 16 in., with trip at any point. Another form of mill by the same makers has two sliding heads. Its capacity is 37 in. in diameter and 29 in. in height. The table is 36½ in. in diameter, and has twenty changes of speed. The feeds are automatic, and range from 1/32 to 1/4 of an in. in angular and vertical directions. Each head feeds independent of the other. The heads can be set at any angle, and carry the tool-bars, which have a movement of 18 in. |
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1895 Bullard Machine Tool Co., Vertical Boring Machine
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