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Years ago, before CNC machines came on the scene, if you needed a very high accuracy boring mill to machine the large side frames of a printing press, or the frame of a paper making machine, or a plastic laminating machine or the pin holes of a die or mold set, your only choice was a DeVlieg Jig Mill. These where the only machines made with the travels and accuracy to bore multiple holes in a side frame of one of these kinds of machines that have many rollers mounted in bearings or journals that need to be aligned nearly perfectly with each other. A well maintained DeVlieg can position with an accuracy of just one tenth per foot over a large distance permitting the kind of precision required for these parts. Today, this work is commonly done with CNC boring mills that have scales and position feedback systems that can achieve this kind of accuracy and repeatability relatively effortlessly. As a result, the DeVlieg is a machine that has fallen out of favor of late, and can be bought for far less money than they once sold for. Today, they are a highly cost effective solution for many shops.
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