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Re: [TowerTalk] Worm Gears

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Worm Gears
From: Howard Hoyt <hhoyt@mebtel.net>
Date: Tue, 30 Jun 2015 23:57:12 -0400
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
Bob, K6UJ wrote:
Hub City recomends a PAG synthetic

PolyAlkyline Glycol lubricants are part of the new API Group V Synthetic lubricants and have unique characteristics lending themselves to gear oils. In general they have very high shear friction, associated with strong cohesive forces in the oil film. This makes them god high-pressure lubricants when formulated for this use. In general they are less well suited to high shear-rate applications like high surface-speed plain bearings.

The newest Oil-Soluble PAGs (abbreviated OSP) can be highly polar and as such show good affinity to metallic surfaces. Some have extremely high viscosity indices approaching 200. This means they will show good performance over a wide range of temperatures. I have no personal experience with these lubricants, but if Hub City recommends their use, it would be counter-productive to use anything else.

Cheers & 73,

Howie - WA4PSC
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