P.S.
I just took a stroll into the garage. This is the culprit to avoid:
https://triflowlubricants.com/product/synthetic-grease
Tri-Flow TF23004
Paul, W9AC
-----Original Message-----
From: TowerTalk <towertalk-bounces@contesting.com> On Behalf Of Paul
Christensen
Sent: Tuesday, December 4, 2018 7:10 AM
To: towertalk@contesting.com
Subject: Re: [TowerTalk] Ham Antenna Rotator: The Teardown
> Norm's Rotator Service on line says: "either a white lithium or green
emerald. Under no circumstances should wheel bearing grease or any other
grease with fibrous material content be used".
> As they said, wheel bearing grease is a fibrous grease and should not
> be used. There is a large selection of greases that are non fibrous.
> There are many (non fibrous) grease lubricants better than Lithium
> which are rated for more severe service and lower temperatures than
> the Lithium. I am planning on using a synthetic grease in my rebuild.
> It will be an overkill for California but I will sleep well at night.
In the '70s, I repacked my CDE rotators every few years using common axle
grease. I'm not sure there was a better quality of grease available for the
DIY crowd although much more expense industrial grease was available back
then.
Possibly "fretting" was involved, but I once had disastrous results when
using a PTFE-based grease. Teflon does not lubricate well under high
pressure of the type achieved with high-ratio gear reduction assemblies.
If rebuilding a ball bearing train today, I would consider Mobil1 or
Valvoline SynPower synthetic grease. PTFE and Lithium would be out of the
running.
Paul, W9AC
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