18 Apr
2016
18 Apr
'16
7:45 p.m.
Forgive my ignorance..
What could possibly justify a cost of $25,000 (US) for a liter of this
Braycote material? Of course, I'm extrapolating - $25/gm, assuming 1000gm/l.
Sounds like a government contract rate to me. MoS2 and TFE-rich lubricants
have been readily available for decades - and while they tend to be on the
pricier side, I've seen nothing that touches $25-28/gm.
On Mon, Apr 18, 2016 at 9:11 PM, Eric Korpela <korpela at ssl.berkeley.edu>
wrote:
On Mon, Apr 18, 2016 at 2:53 PM, Chuck Guzis
<cclist at sydex.com> wrote:
I did some research among the antique fan
collectors on the web.
Here's what's been recommended, in no particular order:
And if you're looking to preserve an extremely valuable museum piece and
need the ultimate in non-reactive oil or grease, a perfluorinated polyether
(PFPE) "oil" or one with PTFE nanoparticles is virtually guaranteed not to
react with anything you might find a computer. But it is very pricey. $25
a gram for Brayco 815z "oil" and $28 a gram for Braycote 601EF or 602EF
(with MoS2). The solvent you need in order to remove them is $0.25 a
gram. But a gram of this stuff goes a long way. I'd go with 602EF for
fan bearings.
But it does somewhat reduce the need to worry about what happens if the
"oil" gets hot or hits rubber or paper or plastic. It doesn't dry out,
evaporate, or gum up at normal temperatures, since it's teflon and
molysufide microbearings in liquid teflon. I wouldn't buy it to use for a
personal machine unless it was one of a kind, or someone at the lab was
throwing out a tube of out-of-date braycote. (Which hasn't been the case,
I don't have a personal stash).