Saturday, February 22, 2020 Text is available under the CC BY-SA 3.0 licence.

Jones,Franklin D. (1879 – 1967)

Author of handbooks on mechanical engineering, workshop mechanics and toolmaking.
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Jones,Franklin D.
In many cases, a jig borer is a "jig eliminator." In other words, such a machine may be used instead of a jig either when the quantity of work is not large enough to warrant making a jig or when there is insufficient time for jig making.
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