Perfect. Specifically, the 0.15" dimension is ideal, and all 3 dims correspond to "FRW-8.5" though they don't label it that way on that page. But others do: http://electronicsupplycorp.com/contents/en-us/d18_I.C._From_8.000__thru_10.999__01.html
In that page is the same manufacturer PRB, and the same item, but actually tagged as FRW8.5. Just to show the dims. Nice find. I paid over $9 for a couple from different suppliers and a different manufacturer, but those same dimensions. A few different "close enough" would probably work, but I think I agree with the ooooold compuserve post which first specced that part number. It was impossible to compare the ID of my original belt, since it was mostly goo. But I did have several strips of "goo that was still in it's original shape until you touch it", and from those I could verify that the thickness and width matched. For the ID, you can run a string around the pulleys and get a maximum size, but the relaxed/un-stretched belt needs to be some amount smaller than that. I don't know the formula for determining what the technically most correct ID should be to provide the ideal amount of secure traction without putting any more pressure on the bearings and shafts than needed, for the greatest longevity of the bushings and shafts. But it feels at least reasonable. I have tried 8.6 and 8.9 too, and they work. But I think maybe the looser ones might become too loose after a while, or maybe they allow the speed of the disk to bounce/flutter more from the controlled speed of the motor? Or could after they loosen a little over time? Anyway I can say that what you found matches the old m100sig info, and matches what I got myself, and works. -- bkw On Jul 31, 2017 10:58 AM, "Kurt McCullum" <[email protected]> wrote: > I wasn't intending to but a TPDD2 but one came with an auction I won. So I > figured I'd restore it. > > I've looked through the archives of the mailing list and I think I have > found the right belt but wanted to ask for verification. Will this belt > work? > > http://www.mcmelectronics.com/product/42-3215 > > > Kurt > >
