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Old 12-17-2017, 03:29 PM
Texasgeezer Texasgeezer is offline
E300d 1995
 
Join Date: Jun 2017
Location: Near Lake Texoma
Posts: 480
I must be getting 'oldtimers', this is the 3rd time I've tried posting this. Guess I'm dozing off before completing it.

For quite a few hours I've been reading about sintered bearings and their lubrication. In the early days of sintered bearings some greases were made by adding clay to an oil. This clay would quickly block the pores and stop the lubrication.

What I think I've found is that Krytox ( spin off from a Dupont product line) makes oils and greases that are compatible with sintered bearings.

Some of the websites I looked at:

http://www.nationalbronze.com/News/self-lubrication-options-for-bronze-bearings/

BryCoat Tungsten Disulfide (WS2)

https://www.chemours.com/Lubricants/en_US/products/Products_Greases.html

https://www.chemours.com/Lubricants/en_US/assets/downloads/krytox_auto_brochure_L14353.pdf

https://www.chemours.com/Lubricants/en_US/tech_info/Index.html

This is fairly long, but if you look towards the bottom of this web page, it show how good Krytox is for pretty much eliminating galling:

Why use only DuPont Teflon Bearing Grease? really thorough testing of several lubricants

There is a space age product that will probably be available more in the future and mixed with oils and greases. From what I've read it will adhere itself to stainless steel and other metals. It is 'WS2'. This website is one that provides info about it.

BryCoat Tungsten Disulfide (WS2)

For my tension pivot bolt and arm I'll probably be using Krytox gpl-204 due to its temperature range and viscosity. If I think WS2 might be a good additive then I might mix it in at about a 4-8 percent ratio.
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