[TowerTalk] 2" Thrust bearing With same bolt pattern , Rohn 45

[Ed Stallman]

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 at 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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