Thanks all for the help and Ideas , I like the suggestion of using the
HDPE High Density Polyethylene Black , Only antenna on the mast will be
a 6m .
I found the HDPE on ebay, one inch is the thickest I could find . I
would think that's thick enough ?
Thanks all the the tips , Ed N5DG
On 10/30/2024 9:05 PM, john@kk9a.com wrote:
The DX Engineering bearing does not cost much more than the Rohn TB3. I
have no experience with the DXE bearing but I did briefly own a Rohn bearing
and I quickly replaced due to its tightness. Replacing a bearing is a big
job if you have antennas on the mast so you really want a thrust bearing
that is going to last. Another commercial option is flange bearings but
you'll have to drill a couple of holes in the top plate. US towers uses
them and I believe they have very few issues if you keep them greased. You
can make one out of black Delrin, nylon, UHMW etc material, just drill holes
for the mast and mounting bolts. K3EJJ used to make nylon split bearings
that matched Rohn's hole pattern and they could be installed without
removing antennas however I have not seen them in long time.
John KK9A
Ed Stallman n5dg wrote:
I'm looking for a place to buy a 2" universal thrust bearing that will
have the same bolt pattern as the Rohn 45 flat top plate , I've had the
bearings seize on 3 Rohn bearing . I see DXE has a replacement but
pricey . I think it was here on Tower Talk , I seen links were I can buy
the //universal thrust bearing . Any suggestion is very welcome ./
/Thanks Ed N5DG
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