Here's the basic procedure as I understand it. (I've never done this before, so this may not be correct).
- Remove acme nuts from leadscrew(s)
- Bore out acme nuts, about 1/8" oversize.
- Thoroughly roughen nut surface, then clean well.
- Clean acme screw very well, then apply release agent.
- After release agent is in place, slip acme nut over screw and inject moglice.
- Let sit overnight, allowing moglice to fully cure.
The release agent dissolves in oil, thus giving you the required clearance with minimal backlash. If clearance is too tight, use lapping compound to increase the clearance. Like I said, I've never done this, so there may be some errors in what I just said. Hopefully I'll know for sure after this weekend.
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(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)