[Amps] Conductive Grease

[David C. Hallam]

At one time castor oil was used in automobile racing engines rather than
petroleum oil.  I can still remember the sweetish exhaust smell of an engine
running on castor oil.  I think that's where Castrol brand oil got its name.

David
KC2JD

> -----Original Message-----
> From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com]On
> Behalf Of EP Swynar
> Sent: Monday, November 26, 2007 9:22 AM
> To: Roger; Harold Mandel; Amps at contesting.com
> Subject: Re: [Amps] Conductive Grease
>
>
> Hi Guys,
>
> I recall some 25 years ago that the tool makers in General Motors where I
> worked used castor oil exclusively on any electro-mechanical devices they
> worked on...
>
> I apply it periodically on the "slider" of my roller inductors, as well as
> on the bearings of variable capacitors here...it DOES get a tad "firm" &
> sticky over time, but my experience here has been that this time
> span is in
> terms of YEARS. A light swipe with a rag wetted with rubbing alcohol,
> followed by another application of the oil, does the trick for me...
>
> ~73~ Eddy VE3CUI - VE3XZ
>
>
> ************************************
>
>
> ----- Original Message -----
> From: "Roger" <sub1 at rogerhalstead.com>
> To: "Harold Mandel" <hmandel at barantelecom.com>; <Amps at contesting.com>
> Sent: Monday, November 26, 2007 9:12 AM
> Subject: Re: [Amps] Conductive Grease
>
>
> > I use "Moly" for bearings in rotators as well as Hardwood
> thrust bearings.
> >
> > 73
> >
> > Roger (K8RI)
> >
> >
> > > The question of a suitable grease for roller
> > > inductor parts came up in this reflector
> > > about one year ago.
> > >
> > > The material called molybdenum disulphide
> > > grease was found to afford the best conductivity
> > > while retaining a good lubrication property.
> > >
> > > This factor made it more desirable for moving
> > > part lubrication than Cool-Ohm silver grease,
> > > which is a suspension of metallic silver in
> > > petroleum media.
> > >
> > > IBM was using the moly grease in card punches
> > > many years ago, as was Bell Telephone using it in
> > > the lubrication of stepper relays, also many years ago.
> > >
> > > Hal Mandel
> > > W4HBM
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