[TowerTalk] thrust bearings

[Gene Smar]

Gents:

     I used an industrial flange type bearing on my top tower shelf:
(2-1/16 " Fafnir SCJ cartridge in GYA-RRB bearing assembly).  You can see a
couple of pix at https://tinyurl.com/y7uxkcj3 and
https://tinyurl.com/yd46dazr .  The bearing itself is self-centering - the
shaft can be up to 1.5 degrees off and the bearing will adjust to align
itself.


73 e
Gene Smar  AD3F


-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of Jim
Sent: Saturday, October 06, 2018 2:43 PM
To: knowkode at verizon.net; towertalk at contesting.com
Subject: Re: [TowerTalk] thrust bearings

They are more properly known as a flange bearing. A pillow block has a
slightly different usage.

https://duckduckgo.com/?q=flange+bearing&atb=v134-3__&iar=images&iax=images&
ia=images


73
Jim W7RY


-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of
knowkode at verizon.net
Sent: Saturday, October 6, 2018 10:57 AM
To: towertalk at contesting.com
Subject: [TowerTalk] thrust bearings

Greetings All,
I have used Rohn TB3 thrust bearings in the past without issue but I have
seen my fair share of worn out  bearings due mainly to an antenna being
parked in one direction for a long time- pitted races were the result. I've
no experience with anything else and that brings me to my question. Is there
something better out there? DXE claims an improvement over the Rohn bearing
but it looks as all they did was add a lower seal. I'm leery of Yaesu if the
bearings are made from the same pot metal as their rotor mast clamps.
Bearing recommendations for an installation with a 2" mast  with about 8'
above the bearing and 2' below and an antenna along the lines of JK's C3S
antenna are sought.
Tnx es 73,JimW5QM
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