Sounds likd an ultra fine abrasive to me. Just the thing to keep all
those precision clearances nice and loose....
Stu
Armand & Lorie Ritchie wrote:
>
> Mark, this might be way off, but maybe you could try diamond powder.
clip
clip
He has one that is 50,000 grit, that ought to be fine
> enough to work.
>
> regards Armand
>
> >Sunbeamers,
> >
> >Over the holidays, I worked on about a dozen Smiths tachometers, in addition
> >to the many tachs I've worked on prior to that. I have noticed that a lot
> >of them were unable to register above 4 to 5 grand. I surmised that the
> >movements were getting dirty and or worn, so I went to my local jeweler to
> >tell him my problem and ask him how he lubricates watches. He suggested I
> >try sewing machine oil. The good news is it didn't seem to make the
> >movement worse, but it sure didn't improve it either. So I gave up on that
> >idea.
> >
> >I solve the problem literally using brute force. I lower the resistance of
> >the thermistor/resistor pair to provide more energy to the deflection coil.
> >While this works, I'd really rather have a way of effectively lubricating
> >these old tachs. The original lubrication is 30 years old.
> >
> >So the question is, what do the various materials and/or mechanical experts
> >on the lists recommend I try to extend the life of these old beasts?
> >
> >I've already had one person suggest sperm oil, but I wouldn't even know
> >where to find that, let alone want to risk bringing down the wrath of whale
> >lovers everywhere onto my head.
> >
> >Mark
> >
> >PS, this email is also a test to see if the "smut filters" at Intergraph
> >will reject an email with the word "lubrication" in it. T.J, email me if
> >you don't get this.
>
> ritchie@mcn.org
> Armand & Lorie Ritchie
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