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Performance of low-cost rotators in cold?

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August 6th 14, 01:44 AM posted to rec.radio.amateur.antenna

Lostgallifreyan Lostgallifreyan is offline

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Performance of low-cost rotators in cold?

(David Platt) wrote in news:quo7bb-
:

And, you can open up these rotators and remove the bearings from the
race, clean 'em out thoroughly, and then re-grease them with a grease
of this sort. Reportedly, you should *not* use wheel-bearing grease
or an "extreme pressure" grease loaded up with moly or a similar
fiberous material, as the additive will build up on the bearings and
races... Norm's Rotor Service recommends using either white lithium,
or emerald grease.

I don't if those are perfluoro polyether greases, but anyway, that's what I
suggest. I've not had the same need, but given that these greases are used in
car parts, and have helped me retore LONG working life to mechanisms that
other greases have failed in, I think PFPE is the way to go. One that I dn
know by name is Krytox, found easily in public domain because it's sold for
scuba breathign gear.

One thing: Use generously, don't scrimp on it because it tends to part
between two moving surfaces rather than gloop between them, so you don't waht
cracks opening up to let dust in to form a grinding paste. Use enough of the
stuff, and it keeps everything out short of direct physical force.

One more thing (no-one expects the Spanish Inquisition) : I do not know what
its UV resistance is....

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