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Title: |
1895 Article-Brown & Sharpe Mfg. Co., Vertical Chucking Machine |
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Source: |
Modern Mechanism 1895 pgs 79-80 |
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Insert Date: |
6/7/2011 9:07:18 PM |
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Brown & Sharpe's Vertical Chucking Machine —The term "chucking-machine" is commonly applied to a turret-lathe in which the revolving head contains a chuck for holding the pieces to be operated upon. It is also, however, sometimes applied, to a vertical machine similar to a vertical boring-machine with a chuck rotating in a horizontal plane, and the vertical sliding head carrying a turret for holding a variety of tools. Such a machine is the Brown & Sharpe vertical chucking-machine shown in Fig. 7. The different tools in the turret-head are easily brought into operation, and, from their perpendicular position, allow the chips to fall through the center of the spindle of the revolving table to the floor, and thus avoid danger of trouble from the clogging of reamers, etc. The machine has the capacity to bore a 4 in. hole, and receive a pulley 36 in. in diameter, 14½ in. face, with hub 12 in. in length. It makes three cuts, and finishes by reaming without the removal of the tools or work. The revolving table is driven by a five-step cone for an 8-in. belt, and is geared 6 to 1. The steps of the cone are so graded as to make the cutting speed uniform for 5 different diameters of holes. The turret has four holes 1¾ in. in diameter, and is securely clamped in position. An adjustable dog allows the locking-pin to be withdrawn at any part of its upward motion. The turret-slide has a movement of 21 in., and an automatic feed, which can be easily and quickly changed from the finest to the coarsest, required; it has quick return by hand, and is counter-balanced by a weight inside of column. |
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