[R-390] Latest update on the EAC R-390A

[Chris Kepus]

Hi Tisha (and group),

Thought I would show some initiative by following up on one of Tisha's
interesting custom mix lubricant formulas... in this case, Tisha intrigued
me by the "nice bath..followed up with a re-lub....Mobil 1 (got that)  mixed
with tungsten disulphide.." (WHAT??!!).  OK, so I Googled TD and found out
that it is: "Tungsten Disulphide (TD) is generally immediately available in
most volumes. Ultra high purity, high purity, submicron and nanopowder forms
may be considered. American Elements produces to many standard grades when
applicable, including Mil Spec (military grade); ACS, Reagent and Technical
Grade; Food, Agricultural and Pharmaceutical Grade; Optical Grade, USP and
EP/BP (European Pharmacopoeia/British Pharmacopoeia)and follows applicable
ASTM testing standards. Typical and custom packaging is available.
Additional technical, research and safety (MSDS) information is available as
is a Reference Calculator for converting relevant units of measurement."

Oh Boy!! Am I in trouble!  I knew if I entered "Tisha Land", it wouldn't be
easy... so then I picked out Brycoat, a company extolling the lubrication
properties of TD. Sent them an email: Where does one buy WS2 (code for TD)?
Got this reply: "Thank you for your inquiry.  We do not sell the raw
material, tungsten disulfide (WS2).  We use our proprietary high velocity
impingement coating process to achieve the best possible adhesion.  If you
would like a price for coating your parts, we will need the part dimensions,
the critical surfaces that need coating and the quantity."  

OK, so I then called ACE hardware, Home Depot, Safeway and Walmart! Yep,
same answer. They don't sell tungsten disulfide, either.

Bottom line: TD sounds like the ultimate lubricant.  So, please, Tisha,
where do you find the stuff?

Thanks es 73,
Chris
W7JPG


-----Original Message-----
From: r-390-bounces at mailman.qth.net [mailto:r-390-bounces at mailman.qth.net]
On Behalf Of Tisha Hayes
Sent: Monday, June 04, 2012 12:38 PM
To: r-390 at mailman.qth.net
Subject: [R-390] Latest update on the EAC R-390A (Snipped)

<snip start> Since you have the RF deck out I would give the gears a nice
bath in a solvent to remove grease/crud and re-lubricate with a high quality
synthetic (I use Mobil1 that is mixed with tungsten disulphide and dispensed
with a syringe, one drop per gear shaft) <snip end>