This is my OPINION...
These bearings were designed to hold a shaft in the HORIZONTAL position
(this is a fact). They were not necessarily designed to be out in the
weather. However, in this low speed application they will work great
for YEARS, even though they are mounted vertically.
Since this is a low speed, low load (depending on the weight of your
mast and antennas) application, use a lightweight grease rather than a
heavy duty bearing grease. I would even consider a light weight
waterproof grease. Some people have never used any more grease than
what came in it from the factory and they have lasted for years...I
don't recommend that. The bearing does not need the grease for
lubrication, as much as it needs it to displace the dirt and water. A
fresh squirt once a year will push the old grease out and the bearing
will live forever!
I would also recommend making a simple shield that clamps to the mast
and "umbrellas" the top of the bearing to keep the water from building
up on the seal surface. Some have used Tupperware bowls or coffee cans
with a 2" hole in the bottom. I'd look at the PVC or rubber plumbing
reducers like SteppIr uses on the elements. You can also cut one out of
a galvanized roof vent pipe shield you pick up at Home Depot. Just make
sure it doesn't rub against the bearing housing and turns with the mast!
Dino - KX6D
-------- Original Message --------
Subject: [TowerTalk] Thrust Bearing Grease
From: "mrlogs" <mrlogs@verizon.net>
Date: Sat, March 14, 2009 2:51 pm
To: <towertalk@contesting.com>
Hi All..
..Just getting a chance to put my tower up..Got it from Tashjian (& the
thrust bearing too)..It came with a choice of grease fittings..a cap,
and a screw-in type grease fitting..I screwed in the metal grease
fitting. ..Question..What type of grease do I "pump" into this thing
(gotta buy a grease gun too..more money!)
Thanks!
73'..Tom N3ZC
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