[labnetwork] Lubricating the Ball Bearings/Chains

[James P McVittie]

Shiva,


We have a 10 yr old AJA sputtering system, which uses a chain drive for the LL transfer and wafer holder positioning. This spring we replaced all the bearings in the chain drive, which made a major difference in the ease  of loading. We got the bearings from McAllister Technical Service, who made the chain drive. With the bearings they sent a tube of MoS2 grease.  We have been using this grease on both the bearings and chain.


Jim McVittie

Stanford Nanofabrication Facility



________________________________
From: labnetwork-bounces at mtl.mit.edu <labnetwork-bounces at mtl.mit.edu> on behalf of Paolini, Steven <spaolini at cns.fas.harvard.edu>
Sent: Thursday, October 29, 2015 3:02 PM
To: Shivakumar Bhaskaran; labnetwork at mtl.mit.edu
Subject: Re: [labnetwork] Lubricating the Ball Bearings/Chains


Shiva,

       My first reaction upon reading your post was to try to convince you NOT to put any sort of lubricant into the chamber if you can avoid it by re-aligning or replacing components. If it is a vacuum system, you will suffer the effects of outgassing if lubricant is introduced and contamination is a concern as well.  If you find that you have to use a lubricant, my suggestion would be to lube the slides only with an inert PFPE lubricant that does not react with other chemicals or provide any dopant, these products usually have a high temperature tolerance but can form toxic compounds if heated over 300 Deg. C. If you need to heat above this temperature, the next step would be the use of silicone grease. I suggest sparingly lubricating the slides only since chains can run dry if they remain clean.

Best of luck,

Steve Paolini

Equipment Dood

Harvard Center for Nanoscale systems.



From: labnetwork-bounces at mtl.mit.edu [mailto:labnetwork-bounces at mtl.mit.edu] On Behalf Of Shivakumar Bhaskaran
Sent: Thursday, October 29, 2015 1:16 PM
To: labnetwork at mtl.mit.edu
Subject: [labnetwork] Lubricating the Ball Bearings/Chains



In one of the equipment the sample stage which moves up and down from loading the sample in deposition chamber is making noise. The sample stage has chains with motor and bearings/sliders to move up and down. I think if I add lubricant the noise can be reduced. As this system might be baked to high temperature, I want to know what sort of lubricants to you use in the cleanroom for your equipment, I want to make sure the grease wont dry out during baking or atleast I don't want to add the lubricant every time I bake.



-Thanks

-Shiva



Shivakumar Bhaskaran, Ph.D.

Searle CleanRoom Manager

The University of Chicago

5735 S.Ellis, Room 032

Chicago-60637

Ph:773-795-2297

https://searle-cleanroom.uchicago.edu/

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