Ron Nossaman wrote: > > What the heck, why not? The fact that the rod is tighter in the hole means > what? It means that the hole is possibly smaller overall, possibly narrower in > one direction even though it's the same or wider in another - but that's not > where I'm going. My thought is that if you can still push the rod into the > holes, they couldn't have gotten all that much smaller - surely not enough > smaller to have compressed a cloth bushing enough to seize a center pin enough > to prevent it's rotation in the flange short of standing on it. Since it's > unlikely that the pin swells that much either, that leaves either, or a > combination of, the birds eye swelling and jamming between the flange ears (if > they don't spread with the swelling of the flange body (another measurement > test?)) and the bushing swelling. > > Ron N Not meaning to be picky... grin.. but I will... how does Terrys experiment yeild any information about the amount of compression that would be exerted on the centerpin ? I mean the drill bit is really hard and aint going nowhere... a felt bushing would give a bit, and I dont think we are exactly clear on just how much pressure it takes to cause a centerpin to get sluggish. That being said... Terry.. it might be more enlightening to try the following ... do the same experiment with and without centerpin bushings... and see which one gets tight. -- Richard Brekne RPT, N.P.T.F. Bergen, Norway mailto:Richard.Brekne@grieg.uib.no
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