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Title: |
1895 Article-Niles Tool Works, Chord Boring Machine |
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Source: |
Modern Mechanism 1895 pgs 80-81 |
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Insert Date: |
6/8/2011 10:52:56 AM |
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Chord Boring-Machine.—Fig. 9 shows a machine made by the Niles Tool Works for boring the holes in bridge-chords and 1-beams. The machine is arranged with two independent heads on one bed, adjustable on the bed for varying lengths. The bed may be made of any length to suit. The two heads are complete in themselves, driven independently, and with all attachments, feeds, etc., for a complete boring-machine. The power is ample for boring four holes, punched 4 to 8 in. diameter, at one time, and the range of speed is such as to adapt the machine for drilling down to 1½ in. holes. The two columns have both power and hand movement for adjustment on the bed. The heads have 18 in. reach, boring to the center of 36 in. They will take in under the cutter work 36 in. high. The spindle has 24 in. traverse. The range of work in length is from 5 to 50 ft. between centers. The feeds are by power, and are reversible up or down, and range from 1/40 to 1/64 in. for heavy work, and coarser feeds for light work. The bed is formed of wrought-iron "I "-beams 15 in. deep. Two independent carriages for supporting work on the bed are provided. |
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1895 Niles Tool Works, Chord Boring Machine
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