Where did you buy your threaded rod?(cheapo leadscrew!) - was it straight?

[BillTodd]

This sounds similar to my little engraver/mill. I had the same trouble with bearing alignment - I faced the nuts in the lathe while on the lead-screw then manually adjusted them to the centre of the bearing (i.e. tapped them with a hammer).

I'd recommend some kind of compliant coupling twixt motor and screw (I used a rubber tube reinforced with plastic tube cut over the top)


[edit] re: Dremel mount

Wrap it in cling film use it as a mould to cast a epoxy (e.g. car body filler) mount? Or, have look at Polymorph, a low temperature thermo-plastic that can be easily moulded by hand.