Gene Bender said: (quoted from post at 04:04:03 01/13/09) Putting some ice on the shaft wont hurt a bit as metal expands something like 6 to the 7th power per inch per degree.
Not quite an exponential power, but the linear expansion would be roughly .000006inch per inch size for every degree F. Area around .000012/square inch/degreeF. Alway wise to double check my math though! :lol:
Small numbers no doubt, but [note math disclaimer!] a 1.5" shaft will be .001 larger with 100degrees F increase in temp; enough to go from a press fit to a slip fit! Cooling the shaft and doing 200 on the pulley, probably gets you to 150 difference, better yet!
A parallel question I have: anyone use anti-seize on press fits? It seems like an oxymoron, but I've found grease [pretty crusty after 70-80 years!] often enough under press fits, and wondered it anti-seize would be good for both assembly and [if I ever need to :shock: ] disassembly without affecting the fit (I don't see why it should hurt a good fit, but never tried it).
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Today's Featured Article - Introduction to the Gibson Model D - by Brandon Burnett. The Gibson Manufacturing Corporation was founded 1946 by Wilber Gibson. The Gibson tractors were made from around 1948 to 1952. The picture shown here is of a 1948 Gibson model D. If you notice, this tractor is driven with a lever. You could get a attachment to convert it to a steering wheel.
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