[In case you came here directly from Google, this page is not a significant resource about the Quorn. It is a small placeholding page which is part of a larger survey of Cutting Tool Forming and Sharpening in my home shop (most of which has to do with the Gorton machine, actually).]
Chaddock, D. H. The 'Quorn' Universal Tool and Cutter Grinder. Leicestershire, UK: TEE Publishing, 1984.
As someone who probably won't ever build a Quorn, the part I find most interesting is Chapter 6, concerning the Spiralling Head for the grinding of small helical cutters without the use of a tooth rest. This would seem to have general application to other machines.
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