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Title: |
1895 Article-E. W. Bliss Co., Boring Machine |
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Source: |
Modern Mechanism 1895 pgs 81-82 |
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Insert Date: |
6/8/2011 11:00:58 AM |
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Fig. 10 shows a horizontal boring-mill built by the E. W. Bliss Co., Brooklyn, N. Y. This machine is especially designed for heavy work, though convenient for general shop use. By its use holes may be bored parallel to each other without resetting the work or traveling same during the process of boring. The table is moved to bring the work in position by a rack and pinion driven by power. The spindle carrying the boring-bar is of steel, 34 in. in diameter, and has a longitudinal feed of 30 in. It is carried by a head with 60 in. vertical adjustment upon a strong upright securely attached to the bed, and the cutter-end of bar is supported through a bush carried by the tail-block upon a similar upright on the left side of the machine. The head and tail blocks are raised and lowered together by means of screws shown, which are driven by power. To compensate for any possible variation in the two vertical adjusting screws, a slight independent adjustment is provided in the tail-block, so as to bring the boring-bar perfectly true with the bed. The driving-cone pulley has four steps, and a heavy back-gear is attached to the spindle, giving eight speeds for the bar. The spindle is fed forward by a rack and pinion having four changes of speed, is driven by a worm-gear, and may be run back quickly by hand. The main spindle is driven directly by a belt from the floor-shaft, and the head may be raised or lowered without changing the length of the belt. The principal dimensions of the machine are as follows: Length of table, 7 ft.; width of table, 3 ft.; extreme width in clear between head and tail blocks, 8 ft.: vertical adjustment of heads, 5 ft.; floor space, 10 X 15 ft.; total height, 0 ft. The weight of the machine is about 26,000 lbs. |
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1895 E. W. Bliss Co., Boring Machine
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