Re: [CAD_CAM_EDM_DRO] galling

Elliot,

Just how high a vacuum are you going under, and is heat involved?

I've done a fair amount of work in ultra-high vacuum, both welding and
assembly of TOF instruments. 303 and brass are considered poison to
ultra-high vacuum, the former if heated will outgas, I believe,
selenium, the latter will outgas zinc. If in your intended application,
minor contamination from these elements isn't a problem, you might get
away with them.
I have to wonder though, if such a tight fit is going to work under
vacuum. Wouldn't take much distortion to cause binding.

There are vacuum rated linear slides, can you make use of them and
justify the expense? Willing to offer some more thoughts if I knew more
about what you are trying to do. If it's proprietary, feel free to reply
privately.

Jon