I do not have a TU58 yet, so I do not know the dimensions of its capstan. However,
I've seen items that are similar to capstan wheels at an industrial supplier I
frequently use. Can somebody head over to
http://mcmaster.com and search for "drive
rollers", and see if any of them are a good size for the TU58? It might be necessary
to buy or make a bushing for the motor shaft if it is not one of the roller bore diameters
that McMaster-Carr carries. The "precision urethane" ones are available with
1/8" bore diameter and roller diameters down to 3/8".
--
Mark J. Blair, NF6X <nf6x at nf6x.net>
Web page:
http://www.nf6x.net/