Instrument ball bearings in vacuum 1

[alansimpson]

I wish to use small ball bearings (5 mm shaft) in light vacuum (-1 bar) I would like to minimize friction.

Are there any special issues I should be considering such as lubrication?

 

[romke]

yes. in vacuum most greases and oils will loose some of the more volatile components, thus leaving behind a lubricant that will be more viscous or thick then acceptable. you better talk to a knowledgable lubricant supplier and to your bearing supplier to discuss your construction and to get advice which lubricant (oil, grease or paste) would best suit your particular requirements

 

[diskullman]

Perfect application for Cobra Solid Graphite lubricant from Unique Technologies. I used to work there.

http://www.uniquetechnologies.com/

Russell Giuliano

 

[unclesyd]

Torrlube, Krytox, Santovac, and Aerospace all have oils or grease products that will work in a vacuum. Another good one is Fomblin.

http://www.torrlube.com/

http://www2.dupont.com/Lubricants/en_US/index.html

http://www.santovac.com/

http://www.aerospacelubricants.com/tribolube/semicon/default.html