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Title: |
1921 Article-G. A. Gray Co., Iron Planer |
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Source: |
Machinery, V28, Dec 1921, pg. 285 |
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Insert Date: |
6/18/2016 7:54:24 PM |
Planers offer some of the most difficult problems to the designer of machine tools, the chief difficulties arising from the fact that the motion of a planer is intermittent and reversing instead of continuous; the length of stroke is not limited to a short distance; and the work to be reversed is generally heavy, so that the whole mechanism must be strong and durable. Another difficulty is due to the fact that a planer is a general-purpose machine and while it must be rugged and powerful for the rapid removal of large quantities of metal, it must also be accurate for the generation of flat surfaces, and must produce a finish free from chatter marks.
The new line of planers built by the G. A. Gray Co., Cincinnati, Ohio, and termed by the builder "Maximum-service" planers, presents a good example of recent developments in planer design. Power, rigidity, durability, automatic lubrication, finish of the work, and convenience and safety of operation have all received due attention in the design of this line. A general view of the 36-inch machine is shown in the heading illustration. |
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1921 G. A. Gray Co., Iron Planer
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