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Originally Posted by sanddrag
A very quick, easy, and reliable way to couple a pot to a shaft of similar size is to heat shrink them together to make a flexible coupling. On a square shaft, it would work superbly because it would get a good hold on it. And on the round pot shaft, it should have enough surface area not to slip. But, you may want to put a small amount fo some sort of adhesive on the pot shaft.
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Now that is something I had never even considered. It makes good sense on a couple different levels. Not only is it simple, and I like simple

, it's inexpensive, and allows for imprecise alignment of the pot and drive shaft without undue stress on the pot.
The only drawback is you will need to get the pot very close to it's calibrated position prior to heating the shrink tube. You "should" be able to trim out the pot by rotating it's housing within the mounting plate or bracket to do any final cal. Then, in worst case, use adhesive as you mentioned.
OK, now I have some experimenting to try this weekend. I'll let you know how it turns out. I'll just need to find a pot that is not too stiff
