[Phono-L] Repairing a fiber gear

[Bob]

Hi Rich,
    Well you were right, the felt was the problem.  It was quite distorted 
and hanging over the edge of the brass disk on the governor.  .  As the rest 
of the felt looked pretty good, I only had to reposition it in the arm that 
holds it and cut off the excess and reform the front so that it was parallel 
with the governor disk.  Thanks for your help.
----- Original Message ----- 
From: "Rich" <rich-mail at octoxol.com>
To: "Antique Phonograph List" <phono-l at oldcrank.org>
Sent: Sunday, June 21, 2009 3:19 PM
Subject: Re: [Phono-L] Repairing a fiber gear


> Try and change the felt without spreading the bent metal that holds it.
>  Usually you can cut a piece of real wool felt a bit tapered and pull
> it into the clamp without bending them as they tend to break.  Use real
> 100% wool felt or it will fail.
>
> Bob wrote:
>> Hi Rich,
>>     The governor felt is pretty much as you described.  I will change
>> that first.  If it's that easy I owe this list a Big Thank you.
>> Bob
>> ----- Original Message ----- From: "Rich" <rich-mail at octoxol.com>
>> To: "Antique Phonograph List" <phono-l at oldcrank.org>
>> Sent: Sunday, June 21, 2009 12:32 PM
>> Subject: Re: [Phono-L] Repairing a fiber gear
>>
>>
>>> Most of the older fiber gears are destroyed by petroleum.  Clean it off
>>> and look at it real hard.  Sanding is not going to fix it.  look at the
>>> felt pad that the governor runs against if its oil soaked and mushed out
>>> the governor will flutter.  Replace the felt.  Use real felt and not
>>> cheap polyester.  F-1 or F-2 grade felt works.  The felt is easy, the
>>> gear not so.
>>>
>>> Bob wrote:
>>>> I'm restoring a Thorens Excelda.  I've got it running pretty well but
>>>> am having a severe problem with wow and flutter.  It's so bad that it
>>>> makes listening almost impossible.  The records appear to be
>>>> traveling at a consistent speed but there must be minute hesitations
>>>> that are impossible to see but they surely affect the sound quality.
>>>> The mainspring is plenty strong so that's not the problem and the
>>>> reproducer sounds fantastic on other machines.  The problem appears
>>>> to be caused by excessive wear on the fiber gear that mates with the
>>>> worm gear in the governor.  A friend suggested I clean it and try to
>>>> build up the bad areas with JB Weld.  I'm afraid to do this because I
>>>> think it will be very difficult to control and be irreversible if I
>>>> do it wrong.  I've been thinking about cleaning all the grease off of
>>>> it and checking over for defects with a magnifier.  If I can see
>>>> areas in the gear thread that are raised I will smooth them out with
>>>> sand paper.  To try to build up an
>>> y areas that look low I will paint on some lacquer or urethane
>>> varnish. As I mentioned earlier, the turntable appears to be rotating
>>> at a consistent speed so It shouldn't take much to true up the teeth
>>> enough to work properly.  I'm looking for second opinions on this
>>> technique or any other technique that you think will solve the
>>> problem.  Thanks
>>>> _______________________________________________
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>>>>
>>>>
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>>
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