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Subject: Re: lubricant in high vacuum? Molykote?
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Date: 09/03/02 at 11:25 AM
Posted by: Donald Mattox
In Reply to: lubricant in high vacuum? Molykote? posted by Maciej Wojdak on 09/03/02 at 10:17 AM:
The problem with oils and greases is that they "creep" and move away from the surface being lubricated. This creeping can also contaminate other surfaces. Therefore "solid film" lubricants are used in vacuum. Molybdenum disulfide is the most common. MoS2 can be applied as a slurry (Molycote) or by sputter deposition. Where there is a high torque present low-shear metals such as silver are also used as a lubricant (ex. the bearings in X-ray tubes). Don Mattox
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