[TowerTalk] FW: Worm Gears
Matt
maflukey at gmail.com
Wed Jul 1 23:52:01 EDT 2015
Most important - check the lubricant level periodically - especially if there are visible signs of seepage around the seal areas. There are sight plugs at different locations on the housing which are used for different mounting positions. For horizontal input shaft positions with the input shaft at the top - look on the flanged face parallel to the input shaft. For horizontal input shaft with the input shaft at the bottom, use the plug on the flanged face parallel to the output shaft. The other mounting positions are irrelevant as they would not be used on tower drives.
The nature of how we use most towers does not result in very many accumulated hours, so primary lubricant life factor is contamination. Contamination results from daily temperature cycles wherein the box "inhales" air through the vent cap as temperatures cool and "exhales" as they rise. A little humidity comes in with each breath. Over time, that humidity can potentially condense and starts to contaminate the lubricant. Although breakdown occurs naturally over time, it becomes accelerated with elevated temperatures. This is one area where the synthetics have come a long way... In any event, we really don't run these gears on towers long enough to heat up the lubricant very much, so breakdown would be very slow.
But now to answer your question, Hub City recommends changing the gear oil every 2,500 operating hours for petroleum based lubes, and every 5,000 hours for synthetics - OR - every 6 months for petroleum based lubes, and every 12 months for synthetic based lubes. I would say the time interval requirement is overly-conservative CYA that covers a multitude of possible applications... but that is only my opinion.
Hope this info is helpful to you.
Matt
KM5VI
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of k2cb at comcast.net
Sent: Wednesday, July 01, 2015 10:27 PM
To: towertalk at contesting.com
Subject: Re: [TowerTalk] Worm Gears
For those of us who own US Tower models with the Hub City boxes - how often should we be changing the lubricant? I see no mention or concern whatsoever from US Tower on the matter. My tower is now approaching 5 years in service, so it is in the back of my mind..........
Eric
K2CB
----- Original Message -----
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Sent: Wednesday, July 1, 2015 10:56:13 PM
Subject: TowerTalk Digest, Vol 151, Issue 2
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Today's Topics:
1. Re: Worm Gears (Richard (Rick) Karlquist)
2. Re: Worm Gears (Robert Harmon)
3. FW: Worm Gears (Matt)
4. Fwd: Fwd: Antenna near chimney - bad idea? (Hans Hammarquist)
5. Re: Worm Gears (Robert Harmon)
6. Fwd: Fwd: Fwd: Antenna near chimney - bad idea?
(Hans Hammarquist)
----------------------------------------------------------------------
Message: 1
Date: Wed, 01 Jul 2015 14:52:00 -0700
From: "Richard (Rick) Karlquist" <richard at karlquist.com>
To: Robert Harmon <k6uj at pacbell.net>, TowerTalk at contesting.com
Subject: Re: [TowerTalk] Worm Gears
Message-ID: <55946100.6010105 at karlquist.com>
Content-Type: text/plain; charset=windows-1252; format=flowed
On 6/30/2015 3:52 PM, Robert Harmon wrote:
> I dont want sabotage our worm gear discussion but wanted to throw in a
> question about gear lube for a worm gear box. I am going to change the gear oil in my US tower
> box. It is a Hub City worm gear. Thinking of using a Mobil 1 Synthetic gear lube, a PAG type.
> Dont ask me what the PAG means but Hub City recomends a PAG synthetic. Any one used a
> synthetic ?
>
> Bob
> K6UJ
>
Mobil 1 LS comes in 75W90 and 75W140. Which is correct
for Hub City? Is 1 quart enough for a gear box?
Rick N6RK
------------------------------
Message: 2
Date: Wed, 1 Jul 2015 15:51:08 -0700
From: Robert Harmon <k6uj at pacbell.net>
To: TowerTalk at contesting.com
Subject: Re: [TowerTalk] Worm Gears
Message-ID: <80E93054-6716-4629-92AD-588A7C83A11A at pacbell.net>
Content-Type: text/plain; charset=us-ascii
Hi Rick,
It needs to be a specific synthetic gear lube.
I called Hub City and they recommend their 460 PAG for worm gears.
They said that the Mobil 1 Glycol 460 is what they are using.
My Hub City worm gear box takes over a quart so I am ordering 2 quarts.
BTW, they should not be filled to the top. About 30 % air space should be left for thermal expansion.
Heres some Hub City info on worm gear lubes, (below)
and below that the specs on the Mobil 1 460 they are talking about.
I am ordering mine on line, not stocked anywhere locally.
Hub City worm gear lube instruction sheet
http://www.hubcityinc.com/documents/LI-WG-S-D-071814.pdf <http://www.hubcityinc.com/documents/LI-WG-S-D-071814.pdf>
Their recommended Mobil 1 synthetic lube
http://www.wardieh.com/admin/document/(2786f39d8352b23e50cf17c424e017c5).pdf <http://www.wardieh.com/admin/document/(2786f39d8352b23e50cf17c424e017c5).pdf>
Bob
K6UJ
> On Jul 1, 2015, at 2:52 PM, Richard (Rick) Karlquist <richard at karlquist.com> wrote:
>
>
>
> On 6/30/2015 3:52 PM, Robert Harmon wrote:
>> I dont want sabotage our worm gear discussion but wanted to throw in a
>> question about gear lube for a worm gear box. I am going to change the gear oil in my US tower
>> box. It is a Hub City worm gear. Thinking of using a Mobil 1 Synthetic gear lube, a PAG type.
>> Dont ask me what the PAG means but Hub City recomends a PAG synthetic. Any one used a
>> synthetic ?
>>
>> Bob
>> K6UJ
>>
>
> Mobil 1 LS comes in 75W90 and 75W140. Which is correct
> for Hub City? Is 1 quart enough for a gear box?
>
> Rick N6RK
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
------------------------------
Message: 3
Date: Wed, 1 Jul 2015 18:06:50 -0500
From: "Matt" <maflukey at gmail.com>
To: <towertalk at contesting.com>
Subject: [TowerTalk] FW: Worm Gears
Message-ID: <006601d0b452$9e460010$dad20030$@gmail.com>
Content-Type: text/plain; charset="us-ascii"
Hi Rick,
Viscosity of ISO 460 converts to SAE 140, 75W140.
Matt
KM5VI
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of
Richard (Rick) Karlquist
Sent: Wednesday, July 01, 2015 4:52 PM
To: Robert Harmon; TowerTalk at contesting.com
Subject: Re: [TowerTalk] Worm Gears
On 6/30/2015 3:52 PM, Robert Harmon wrote:
> I dont want sabotage our worm gear discussion but wanted to throw in a
> question about gear lube for a worm gear box. I am going to change the
gear oil in my US tower
> box. It is a Hub City worm gear. Thinking of using a Mobil 1 Synthetic
gear lube, a PAG type.
> Dont ask me what the PAG means but Hub City recomends a PAG synthetic.
> Any one used a synthetic ?
>
> Bob
> K6UJ
>
Mobil 1 LS comes in 75W90 and 75W140. Which is correct for Hub City? Is 1
quart enough for a gear box?
Rick N6RK
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http://lists.contesting.com/mailman/listinfo/towertalk
------------------------------
Message: 4
Date: Wed, 1 Jul 2015 20:07:47 -0400
From: Hans Hammarquist <hanslg at aol.com>
To: towertalk at contesting.com
Subject: [TowerTalk] Fwd: Fwd: Antenna near chimney - bad idea?
Message-ID: <14e4c173a5a-26a-30edf at webprd-m39.mail.aol.com>
Content-Type: text/plain; charset=utf-8
I have no idea what is generated burning store-bought duraflame fire logs. I know that, brunt "wrong" generate a lot of chemical compounds, creosote being one of them. I still wouldn't recommend putting anything near a chimney. I know what my TV antenna looked like after a few years next to (on top) of my chimney. Not a pretty picture.
Hans - N2JFS
-----Original Message-----
From: John Keating <john.keating at sbcglobal.net>
To: towertalk <towertalk at contesting.com>
Sent: Tue, Jun 30, 2015 10:46 pm
Subject: Re: [TowerTalk] Fwd: Antenna near chimney - bad idea?
Suppose the only thing burned are those store-bought duraflame fire logs?
John KK6PLG
Date: Tue, 30 Jun 2015 15:21:00 -0400
From: Hans
Hammarquist <hanslg at aol.com>
To: towertalk at contesting.com
Subject:
[TowerTalk] Fwd: Antenna near chimney - bad idea?
Message-ID:
<14e45ea4da6-38c1-2b2a1 at webprd-m47.mail.aol.com>
Content-Type: text/plain;
charset=utf-8
The biggest problem is corrosion. Any oil burner
generate a small, but
significant amount of acid that will corrode your tower,
antenna, rotor,
etc. faster than away from the chimney. I have not seen any
problems with
soot.
Hans - N2JFS
To:
<towertalk at contesting.com>
Subject: [TowerTalk] Antenna
near
chimney - bad idea?
From: John Keating
<john.keating at sbcglobal.net>
Date: Mon,
29 Jun 2015 10:01:47 -0700
I have limited options for placing my 40' tower and tribander at my
QTH.
One of
them is next to the 2 story house very near the 33' chimney.
Am wondering if
anyone has experience...soot affecting rotor or antenna
parts?
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list
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------------------------------
Message: 5
Date: Wed, 1 Jul 2015 18:55:23 -0700
From: Robert Harmon <k6uj at pacbell.net>
To: towertalk <towertalk at contesting.com>
Subject: Re: [TowerTalk] Worm Gears
Message-ID: <FBEBFE42-E3A2-4211-A57F-CAD8D1E434BD at pacbell.net>
Content-Type: text/plain; charset=us-ascii
Matt,
The viscosity is only part of the equation.
I might be a comparable viscosity but there are many other ingredients
that are formulated into the lubricants for specific applications.
The gear lube we are discussing is a synthetic lube specifically formulated for worm gears.
Bob
K6UJ
> On Jul 1, 2015, at 4:06 PM, Matt <maflukey at gmail.com> wrote:
>
> Hi Rick,
>
> Viscosity of ISO 460 converts to SAE 140, 75W140.
>
> Matt
> KM5VI
>
> -----Original Message-----
> From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of
> Richard (Rick) Karlquist
> Sent: Wednesday, July 01, 2015 4:52 PM
> To: Robert Harmon; TowerTalk at contesting.com
> Subject: Re: [TowerTalk] Worm Gears
>
>
>
> On 6/30/2015 3:52 PM, Robert Harmon wrote:
>> I dont want sabotage our worm gear discussion but wanted to throw in a
>> question about gear lube for a worm gear box. I am going to change the
> gear oil in my US tower
>> box. It is a Hub City worm gear. Thinking of using a Mobil 1 Synthetic
> gear lube, a PAG type.
>> Dont ask me what the PAG means but Hub City recomends a PAG synthetic.
>> Any one used a synthetic ?
>>
>> Bob
>> K6UJ
>>
>
> Mobil 1 LS comes in 75W90 and 75W140. Which is correct for Hub City? Is 1
> quart enough for a gear box?
>
> Rick N6RK
> _______________________________________________
>
>
>
> _______________________________________________
> 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
------------------------------
Message: 6
Date: Wed, 1 Jul 2015 22:56:03 -0400
From: Hans Hammarquist <hanslg at aol.com>
To: towertalk at contesting.com
Subject: [TowerTalk] Fwd: Fwd: Fwd: Antenna near chimney - bad
idea?
Message-ID: <14e4cb145ec-26a-315a6 at webprd-m39.mail.aol.com>
Content-Type: text/plain; charset=utf-8
Think about it, that chimney is connected to a wood burning stow. I guess wood gives off acid as well.
Hans - N2JFS
-----Original Message-----
From: Hans Hammarquist via TowerTalk <towertalk at contesting.com>
To: towertalk <towertalk at contesting.com>
Sent: Wed, Jul 1, 2015 9:47 pm
Subject: [TowerTalk] Fwd: Fwd: Antenna near chimney - bad idea?
I have no idea what is generated burning store-bought duraflame fire logs. I
know that, brunt "wrong" generate a lot of chemical compounds, creosote being
one of them. I still wouldn't recommend putting anything near a chimney. I know
what my TV antenna looked like after a few years next to (on top) of my chimney.
Not a pretty picture.
Hans - N2JFS
-----Original Message-----
From:
John Keating <john.keating at sbcglobal.net>
To: towertalk
<towertalk at contesting.com>
Sent: Tue, Jun 30, 2015 10:46 pm
Subject: Re:
[TowerTalk] Fwd: Antenna near chimney - bad idea?
Suppose the only thing
burned are those store-bought duraflame fire logs?
John KK6PLG
Date:
Tue, 30 Jun 2015 15:21:00 -0400
From: Hans
Hammarquist
<hanslg at aol.com>
To: towertalk at contesting.com
Subject:
[TowerTalk] Fwd:
Antenna near chimney - bad
idea?
Message-ID:
<14e45ea4da6-38c1-2b2a1 at webprd-m47.mail.aol.com>
Content-Type:
text/plain;
charset=utf-8
The biggest problem is corrosion. Any oil
burner
generate a small, but
significant amount of acid that will corrode your
tower,
antenna, rotor,
etc. faster than away from the chimney. I have not seen
any
problems with
soot.
Hans - N2JFS
To:
<towertalk at contesting.com>
Subject: [TowerTalk]
Antenna
near
chimney - bad idea?
From: John
Keating
<john.keating at sbcglobal.net>
Date: Mon,
29 Jun 2015 10:01:47
-0700
I have limited options for placing my 40' tower and
tribander at my
QTH.
One of
them is next to the 2 story house very near
the 33' chimney.
Am wondering if
anyone has experience...soot affecting rotor
or
antenna
parts?
_______________________________________________
_______________________________________________
TowerTalk
mailing
list
TowerTalk at contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk
mailing
list
TowerTalk at contesting.com
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End of TowerTalk Digest, Vol 151, Issue 2
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