I agree Ron. That's kinda what I was getting at when I said it made a huge difference - I don't remember the numbers, but it went from a lot of runout to something very minimal - but of course, check it. I couldn't find a part number on my chuck. It is a Jacobs, it has a 33 taper (but I suppose that might vary with a different drill press) and it adjusts from 5/64 to 1/2-inch (2 - 13 mm). Terry Farrell > >I bought a basic Jacobs chuck. I paid just under $100. Made a huge > >difference. I know Jacobs is a well-known large chuck manufacturer. > > Good suggestion Terry. But don't take it for granted that it will be > free of run-out just because its a Jacobs. We have two of them at our > place, and one should be have been returned when it was purchased. > I'd recommend taking a dial gauge along to your supplier and checking > it in a drill with a piece of round ground stock as a test piece. > > Even some of the Chinese stuff is testing straight these days, but > sometimes they fail because the heat treating isn't. > > Ron O.
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