[TowerTalk] TowerTalk Digest, Vol 102, Issue 44
RTTYMAN at aol.com
RTTYMAN at aol.com
Wed Jun 29 12:37:25 PDT 2011
Thrust Bearing.
I have a Rohn TB-4 Thrust Bearing & I just measured it. It will seemingly
take up to a three inch mast based on the inside measurement.
It is For Sale ... should someone be interested?
It is without the four base plate mounting bolts or the four bolts that go
thru the rotating part to apply a grip on a mast. It rotates freely and no
binding was felt.
Reply off-line if interested. _rttyman at aol.com_ (mailto:rttyman at aol.com)
Les, NN6K
In a message dated 6/29/2011 12:00:58 P.M. US Mountain Standard Time,
towertalk-request at contesting.com writes:
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Today's Topics:
1. Need 3.5" Thrust Bearing (Mike Cizek)
2. Re: Need 3.5" Thrust Bearing (TexasRF at aol.com)
3. Re: Need 3.5" Thrust Bearing (Ben Horton)
4. Re: Need 3.5" Thrust Bearing (Rich Hallman - N7TR)
5. Re: HAM-IV Ball Bearings (K8RI on TT)
6. Re: Need 3.5" Thrust Bearing (K8RI on TT)
7. Tower Legs in Concrete (rfman45)
8. Re: Tower Legs in Concrete (Eddy Swynar)
9. Back on the air (Mike)
10. Re: Need 3.5" Thrust Bearing (Jay Kesterson K0GU)
----------------------------------------------------------------------
Message: 1
Date: Tue, 28 Jun 2011 21:41:10 -0400
From: "Mike Cizek" <mikew3mc at gmail.com>
Subject: [TowerTalk] Need 3.5" Thrust Bearing
To: <towertalk at contesting.com>
Message-ID: <8A5276F4C89445D6B37D1125E463F535 at itx>
Content-Type: text/plain; charset="us-ascii"
I need a thrust bearing for a 3.5" mast for a tower project and am
having a hard time finding one. Anybody have a source? Thanks.
73,
Mike W3MC
------------------------------
Message: 2
Date: Tue, 28 Jun 2011 21:54:46 EDT
From: TexasRF at aol.com
Subject: Re: [TowerTalk] Need 3.5" Thrust Bearing
To: mikew3mc at gmail.com, towertalk at contesting.com
Message-ID: <64eaf.720f12fe.3b3bdfe6 at aol.com>
Content-Type: text/plain; charset="US-ASCII"
Mike, a quick Ebay search for 3 1/2" bearing turned up several four hole
flange bearings over a range of $329 to $1300 as well as one offering that
goes another 3 days to the high bidder.
You can have a local bearing supplier order one for you but expect to pay
$1200 or more.
73,
Gerald K5GW
In a message dated 6/28/2011 8:41:31 P.M. Central Daylight Time,
mikew3mc at gmail.com writes:
I need a thrust bearing for a 3.5" mast for a tower project and am
having a hard time finding one. Anybody have a source? Thanks.
73,
Mike W3MC
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------------------------------
Message: 3
Date: Tue, 28 Jun 2011 21:44:25 -0500
From: Ben Horton <whorton at cablelynx.com>
Subject: Re: [TowerTalk] Need 3.5" Thrust Bearing
To: towertalk at contesting.com
Message-ID: <4E0A9189.5070800 at cablelynx.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
On 6/28/2011 8:54 PM, TexasRF at aol.com wrote:
> Mike, a quick Ebay search for 3 1/2" bearing turned up several four hole
> flange bearings over a range of $329 to $1300 as well as one offering
that
> goes another 3 days to the high bidder.
>
> You can have a local bearing supplier order one for you but expect to pay
> $1200 or more.
>
> 73,
> Gerald K5GW
>
>
>
>
> In a message dated 6/28/2011 8:41:31 P.M. Central Daylight Time,
> mikew3mc at gmail.com writes:
>
> I need a thrust bearing for a 3.5" mast for a tower project and am
> having a hard time finding one. Anybody have a source? Thanks.
>
> 73,
>
> Mike W3MC
>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
Try the following for a 4 hole horizontal pillow block bearing unit
(horizontal flange mounting):
Locate Ball Bearings
http://www.locateballbearings.com
800-409-3632
Prices are very reasonable.
Ben, K5EX
------------------------------
Message: 4
Date: Tue, 28 Jun 2011 19:52:34 -0700
From: "Rich Hallman - N7TR" <rich at n7tr.com>
Subject: Re: [TowerTalk] Need 3.5" Thrust Bearing
To: <mikew3mc at gmail.com>, <towertalk at contesting.com>
Message-ID:
<9CD478F256BECE4DBE63B1F881BC2FF3212438 at exchange-server.n7tr.com>
Content-Type: text/plain; charset="us-ascii"
Ive had great luck with these guys.....I have 4 in the air for the past
few years with no issues to date.
http://www.thebigbearingstore.com/fourboltflangebearing.html
73 Rich N7TR
-----Original Message-----
From: towertalk-bounces at contesting.com
[mailto:towertalk-bounces at contesting.com] On Behalf Of Mike Cizek
Sent: Tuesday, June 28, 2011 6:41 PM
To: towertalk at contesting.com
Subject: [TowerTalk] Need 3.5" Thrust Bearing
I need a thrust bearing for a 3.5" mast for a tower project and am
having a hard time finding one. Anybody have a source? Thanks.
73,
Mike W3MC
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------------------------------
Message: 5
Date: Wed, 29 Jun 2011 05:27:50 -0400
From: K8RI on TT <k8ri-on-towertalk at tm.net>
Subject: Re: [TowerTalk] HAM-IV Ball Bearings
To: towertalk at contesting.com
Message-ID: <4E0AF016.4010900 at tm.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
On 6/28/2011 2:34 PM, Al Kozakiewicz wrote:
> *Made to look like new*. Which reminds me, be careful at swaps. I've
> seen a lot of rotators for sale recently that look like new. Are they
> completely rebuilt, or have they just had a nice paint job?
A few years back I stopped in at the FBO (Up North) where I used to take
my plane. He was showing me a beautiful Cessna 310 (Twin Engine). He
said the bought a real nice "paint job". On a close inspection, it
didn't look so good. When you have a problem "up there" you can't just
pull over and get out the tool box.<:-))
73
Roger (K8RI)
>
> There's a term hot rodders use for engines that fit this description -
"Krylon Rebuild"
>
> Al
> AB2ZY
> _______________________________________________
>
>
>
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>
------------------------------
Message: 6
Date: Wed, 29 Jun 2011 05:34:47 -0400
From: K8RI on TT <k8ri-on-towertalk at tm.net>
Subject: Re: [TowerTalk] Need 3.5" Thrust Bearing
To: towertalk at contesting.com
Message-ID: <4E0AF1B7.60604 at tm.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
On 6/28/2011 9:41 PM, Mike Cizek wrote:
> I need a thrust bearing for a 3.5" mast for a tower project and am
> having a hard time finding one. Anybody have a source? Thanks.
>
How about the ROHN TB-4? The opening is considerably larger than the
TB-3. I'd have to go out and measure just how large a mast they can
handle and I don't know if they are still made.
73
Roger (K8RI)
> 73,
>
> Mike W3MC
>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
------------------------------
Message: 7
Date: Wed, 29 Jun 2011 08:30:34 -0500
From: rfman45 <rfman45 at hotmail.com>
Subject: [TowerTalk] Tower Legs in Concrete
To: <towertalk at contesting.com>
Message-ID: <SNT137-w1152D0999935A0C60D08D2B8590 at phx.gbl>
Content-Type: text/plain; charset="iso-8859-1"
I'm installing some Rohn 45 with base being a half section in concrete. I
see that there has been a TT discussion of whether to coat the legs of the
buried section where they exit the concrete on top with some sort of
coating. One poster stated that Rohn recommended this but I cannot find any
reference to it. Can anyone clarify if this is necessary and if so, how should
the legs be coated at the exit point? As always, thank you one and all for
your generosity in sharing your knowledge. Mike W2LO
------------------------------
Message: 8
Date: Wed, 29 Jun 2011 09:35:28 -0400
From: Eddy Swynar <deswynar at xplornet.ca>
Subject: Re: [TowerTalk] Tower Legs in Concrete
To: rfman45 <rfman45 at hotmail.com>
Cc: towertalk at contesting.com
Message-ID: <AFD032ED-23CF-430F-AD3C-C301DA769289 at xplornet.ca>
Content-Type: text/plain; charset=us-ascii
Hi Mike,
The DELHI-brand self-supporting tower instructions here do not
specifically reference the necessity of coating the in-cement leg extensions with
ANYTHING...
They DO, however, explicitly state that you must install long bolts
through holes in the extensions at the bottom, to ensure that the things won't
somehow extricate themselves from the concrete.
~73~ de Eddy VE3CUI - VE3XZ
****************************************************************************
********************************************
On 2011-06-29, at 9:30 AM, rfman45 wrote:
>
>
>
>
> I'm installing some Rohn 45 with base being a half section in concrete.
I see that there has been a TT discussion of whether to coat the legs of
the buried section where they exit the concrete on top with some sort of
coating. One poster stated that Rohn recommended this but I cannot find any
reference to it. Can anyone clarify if this is necessary and if so, how should
the legs be coated at the exit point? As always, thank you one and all for
your generosity in sharing your knowledge. Mike W2LO
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
------------------------------
Message: 9
Date: Wed, 29 Jun 2011 10:53:36 -0400
From: Mike <nf4l at att.net>
Subject: [TowerTalk] Back on the air
To: towertalk reflector <towertalk at contesting.com>
Message-ID: <4E0B3C70.50809 at att.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Thanks to Rob K6DQ on the tower and helping with ground repair and Steve
AB4UF on the
ground, my 4 element SteppIR is working again. The problem was the tape
had come off
the reel on the 30/40 driven element. No reason was found. I'm on my 3rd
EHU for
this. SteppIR was very good about replacing the bad units.
73, Mike NF4L
------------------------------
Message: 10
Date: Wed, 29 Jun 2011 11:22:12 -0600
From: Jay Kesterson K0GU <k0gu at verinet.com>
Subject: Re: [TowerTalk] Need 3.5" Thrust Bearing
To: towertalk at contesting.com
Message-ID: <4E0B5F44.6000402 at verinet.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
On 6/29/2011 3:34 AM, K8RI on TT wrote:
> On 6/28/2011 9:41 PM, Mike Cizek wrote:
>> I need a thrust bearing for a 3.5" mast for a tower project and am
>> having a hard time finding one. Anybody have a source? Thanks.
>>
> How about the ROHN TB-4? The opening is considerably larger than the
> TB-3. I'd have to go out and measure just how large a mast they can
> handle and I don't know if they are still made.
I just measured one of the two TB-4s I have stored on the basement.
Less than 3.1" diameter opening.
73, Jay K0GU
------------------------------
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End of TowerTalk Digest, Vol 102, Issue 44
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