I have a NIB 2 inch ID bearing in a 4 mounting hole pillow block with
grease Zerk. It is one HD unit rated for way more than needed and cost
about $20. The box is labeled CJ Bearings and is part number
UCF210-31. There are only two hams in our ZIP Code and we went together
and bought two. His is in use and doing fine while mine awaits the
arrival of my repurposed prop pitch motor, SteppIR DB42, and Tash Tower
HD LM354.
The box has this statement printed on a side panel, "Do not open until
ready to use, keep dry and clean." I will be assessing the
methods/repurposed plumbing components mentioned here as used for
protection against the environmental hazards. I have a hard time
understanding the rationale behind paying near or over $100 for a
bearing very similar to mine. Maybe if I framed and displayed a high
dollar sales receipt from DXE or a tower company perhaps that would help
justify the price. ;) ;)
After all, a little frog that has been hand raised, dew picked, and
lightly killed is still just a crunchy little dead frog even if related
processes read like the menu of a high dollar French restaurant.
Patrick NJ5G
On 4/18/2015 11:04 PM, Roger (K8RI) on TT wrote:
All of the new TB-3s and 4s I've tried felt very rough. A real
bearing would be replaced if it were that rough, BUT the do the job
well. Gene's suggestion are much better bearings. My new (used, but
new to me)LM470 has one of those mounted on top. I'd suggest a cover
of some sort to protect it from the rain. They get rusty looking and
look like crap, but continue to work well.
73
Roger (K8RI)
On 4/17/2015 12:49 PM, Robert Harmon wrote:
I am overhauling my rotator and thought it would be good to replace
my thrust bearing also.
I have the Rohn TB3 bearing now. It has been in use for 18 years and
feels pretty rough.
Im thinking of going with a different bearing this time with a steel
body and greased. (grease fitting)
Looked thru the archives on tower talk to find out what others have
used and can’t find much,
on this type of replacement and I know the bearing supply houses have
them, just haven’t
pursued searching with them yet. I would like to know what others
have used.
If you have used a thrust bearing like this, could you share
the number and supplier ? Array Solutions has their model TB2 which
is this type
of bearing but it only has a two hole flange for mounting. They have
a larger unit with a 4 hole
flange but it is for a larger diameter mast than 2 inch. I want a 4
hole flange but for 2 inch.
Here is the info from their webpage:
https://www.arraysolutions.com/Products/thrustbearing.htm
Anyway, what say you ?
thanks,
Bob
K6UJ
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