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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Quote text and notes from Wikiquote: Franklin D. Jones (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.