I don't think he can get it too accurate anyway, since knurls are often a bit inconsistent. But in this application, where the part has to rotate against another moving or non-moving part, any non-concentricity may cause the grain mill to not work well, or maybe not at all.RMinMN wrote: ↑Thu May 31, 2018 5:10 am I think you are too concerned with accuracy. Accuracy counts for more as speeds increase. Your grain mill won't or shouldn't be turning extremely fast. Instead of trying to get down to the tenth, accurate within a thousandth is probably more than enough. Chuck that knurled shaft in, get it close as you reasonable can, and turn the end down.
Dave