[TowerTalk] K0XG ROTATION SYSTEM ADVIC E

[Richard Thorne]

Gary,

Which make/model cam followers are on the K0XG rings?

I have McGill CCFH 1 1/2 SB on my rings.

Rich - N5ZC


On 2/27/2017 3:02 PM, StellarCAT wrote:
> Hey Bill,
>
> Well...... I can tell you a long story of woe with my K0XG system .... 
> getting support is near impossible, actually was until I needed to 
> replace ALL the cam followers on the used system I bought. They were 
> ALL sticking to one degree or another a good share totally jammed. I 
> did get replaced by K0XG (who replied then). Prior to that emails and 
> vmails went unanswered. I was told by several that "I've never heard 
> of that happening before" ... and yet I had all 18 of mine (had 
> another ring - it too had jammed ones, making 24) ... and now I guess 
> you're only the second person to experience this (?!).
>
> I'd replace them. For $25 a piece I don't think its worth the risk. 
> The design of this system is so unlike the RTS system. I don't know of 
> any good way to replace a bearing if it goes in situ. Unlike the RTS 
> system where ALL bearings including the major one are replaceable. The 
> only plus it has over the RTS is the ability to mount it anywhere but 
> if I had it to do over again and had seen what I've seen I'd have gone 
> the other way. I know the 'slots' that are there for adjustment, which 
> make zero sense since they are for rings that are already designed 
> (the only explanation being they're non-concentric and/or circular) 
> made it darn near impossible to get 2 rings together and even now is 
> it turns a slight bit tight at points in rotation.
>
> Also note if you haven't already the whole structure is turned through 
> 3 - 1/2" bolts that are exposed for over 7"! I replaced those that it 
> came with and bought grade 8 bolts for these.
>
> write to me direct if you have any other questions I might be able to 
> help with.
>
> Gary
> K9RX
>
>
>
> -----Original Message----- From: Richard Thorne
> Sent: Monday, February 27, 2017 2:56 PM
> To: towertalk at contesting.com
> Subject: Re: [TowerTalk] K0XG ROTATION SYSTEM ADVIC E
>
> Bill,
>
> I purchased and refurbished a used rotating tower a year and a half ago.
>
> For what ever reason I ended up having a few bearings stick (and they
> were new) a few months after installation.  I realized I had a problem
> when the guy wires were bouncing around.  I determined that a couple of
> the bearings were sticking.  I replaced them with free wheeling
> bearings, problem solved.
>
> I purchased 18 bearings (I have 3 sets of rings) on ebay so I didn't
> have any recourse but to replace the 2 bad bearings.  I purchased the
> replacements and a couple spares from a local bearing company.
>
> Mine is an original Dick Weber design which uses 6 cam followers per
> ring set, 3 on each ring.
>
> I would suggest replacing them before they go up it's a lot easier on
> the ground, hi hi.
>
> Rich - N5ZC
>
>
>
> On 2/27/2017 1:24 PM, Bill via TowerTalk wrote:
>> About a year ago I bought a Rohn 55 rotation system from K0XG.  After 
>> over a year I finally got granted a permit to put the tower up.  The 
>> tower is scheduled to go up in 3 or 4 weeks and I was checking the 
>> rotating rings and was in the process of using the grease gun on the 
>> fittings when I found several of the bearings in the rings were not 
>> rotating like the others.  Of the total of 12 bearings, 3 were not 
>> moving as they should.  9 were able to be rotated by hand, but the 3 
>> were tight.  I used the grease gun on all the fittings including the 
>> three bulky ones.  I am now able to rotate the three by gripping with 
>> pliers with not much effort, but can not do it by hand.
>>
>> Is this an issue?  I called Richard at K0XG systems but have no heard 
>> back from him yet.
>>
>> The three bearings do not appear to be damaged in any way and look 
>> just like the others that rotate freely.
>>
>> My thinking on this is it may not be an issue.  With 1100 pounds of 
>> torque on each of the guys (5/16 EHS), plus the weight of the tower 
>> and antennas (another 1000 lbs) the sheer weight will "force" the 
>> sticky bearings to rotate.
>>
>> Has anyone had an issue similar to this?  Anybody with advice, 
>> including how difficult is it to replace these bearings, brand, where 
>> to find them etc.?
>>
>> Thanks in advance for the help, and with a little luck KH7XS should 
>> be back on the air by mid April.
>>
>> Bill K4XS/KH7XS
>>
>>
>>
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>>
>>
>>
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