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This confirms some of the scuttlebutt I've heard, fake bearings, but I can't
say that I've run across suspect Timkens... yet.
I was told by a Timken supplier that some of them are made in ??? nowadays but
he didn't elaborate.
I have also noticed that the races on some appear to be pretty soft, they
deform easily with a mild steel drift.
Glen
-----Original Message-----
From: Aaron Johnson <hpspitfire@gmail.com>
To: Jason Sukey <jsukey@gmail.com>
Cc: FOT list <fot@autox.team.net>
Sent: Fri, Sep 30, 2016 11:21 am
Subject: Re: [Fot] variation in Timken carrier bearing width?
How did you order the bearings? There is a huge counterfit bearing
manufacturing market. I have lost count how many times over the last 6 years
I've had to investigate them. The last set of ball bearings I bought were skf
but we're obviously not legitimate. I took it with me to skf on a visit and
confirmed it was not made in any of their factories.
If you've got concerns of counterfit bearings send me some pictures and I can
help.
Aaron
Sent from my iPhone
On 29-Sep-2016, at 10:29 PM, Jason Sukey <jsukey@gmail.com> wrote:
John,
Replacing the old bearings because they were worn out. New Timkens
seem to be the best available option.
Jason
On Thu, Sep 29, 2016 at 12:52 PM, John Styduhar <johnstydo@gmail.com> wrote:
Some of the USA-stamped Timkens even look cheap when you compare them to the
England-made. I wouldn't be surprised if they were made overseas. If there is
nothing wrong with your old bearings, why replace them?
On Thu, Sep 29, 2016 at 8:59 AM, Jason Sukey <jsukey@gmail.com> wrote:
Has anyone else noticed rather large variation in carrier bearing width's when
rebuilding a spitfire differential? The one I'm building right now, I've
replaced what I suspect are the original bearings (Timken England) with brand
new Timken USA bearings. In order to reach the required .004" preload, it will
require .012" LESS total shim than what was in there originally. That seems
like a big difference with the only variable being new bearings. I'm using the
same housing, same carrier, the bearings visually look to be fully pressed
home. Anyone else experience this?
Thanks,
Jason Sukey
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<font color='black' size='2' face='Arial, Helvetica, sans-serif'>Th<font
size="2">is confirms some of the scuttlebutt I've heard, fake bearings, but I
can't say that I've run across suspect Timkens... yet.<br>
I was told by a Timken supplier that some of them are made in ??? nowadays but
he didn't elaborate.<br>
I have also noticed that the races on some appear to be pretty soft, they
deform easily with a mild steel drift.<br>
Glen<br>
</font>
<div> <br>
</div>
<div> <br>
</div>
<div> <br>
</div>
<div
style="font-family:arial,helvetica;font-size:10pt;color:black">-----Original
Message-----<br>
From: Aaron Johnson <hpspitfire@gmail.com><br>
To: Jason Sukey <jsukey@gmail.com><br>
Cc: FOT list <fot@autox.team.net><br>
Sent: Fri, Sep 30, 2016 11:21 am<br>
Subject: Re: [Fot] variation in Timken carrier bearing width?<br>
<br>
<div id="AOLMsgPart_1.2_ecf98ad5-1638-420e-8510-2a3a7bf1470b">
<div dir="auto" class="aolReplacedBody">
<div>How did you order the bearings? There is a huge counterfit
bearing manufacturing market. I have lost count how many times over the
last 6 years I've had to investigate them. The last set of ball bearings
I bought were skf but we're obviously not legitimate. I took it with me
to skf on a visit and confirmed it was not made in any of their factories.
</div>
<div id="AppleMailSignature"><br>
</div>
<div id="AppleMailSignature">If you've got concerns of counterfit bearings send
me some pictures and I can help. </div>
<div id="AppleMailSignature"><br>
</div>
<div id="AppleMailSignature">Aaron<br>
<br>
Sent from my iPhone</div>
<div><br>
On 29-Sep-2016, at 10:29 PM, Jason Sukey <<a target="_blank"
removedlink__812cfc23-9ba6-4f15-a506-ffc2bc66dd2f__href="mailto:jsukey@gmail.com";>jsukey@gmail.com</a>>
wrote:<br>
<br>
</div>
<blockquote>
<div>
<div dir="ltr">John,
<div> Replacing the old bearings because they were
worn out. New Timkens seem to be the best available option.</div>
<div><br>
</div>
<div>Jason</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Thu, Sep 29, 2016 at 12:52 PM, John Styduhar <span
dir="ltr"><<a target="_blank"
removedlink__812cfc23-9ba6-4f15-a506-ffc2bc66dd2f__href="mailto:johnstydo@gmail.com";>johnstydo@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc
solid;padding-left:1ex">
<div dir="ltr">
<div class="gmail_default" style="font-size:small">Some of the USA-stamped
Timkens even look cheap when you compare them to the England-made. I
wouldn't be surprised if they were made overseas. If there is nothing wrong
with your old bearings, why replace them?</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">
<div>
<div class="h5">On Thu, Sep 29, 2016 at 8:59 AM, Jason Sukey <span
dir="ltr"><<a target="_blank"
removedlink__812cfc23-9ba6-4f15-a506-ffc2bc66dd2f__href="mailto:jsukey@gmail.com";>jsukey@gmail.com</a>></span>
wrote:<br>
</div>
</div>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc
solid;padding-left:1ex">
<div>
<div class="h5">
<div dir="ltr">Has anyone else noticed rather large variation in carrier
bearing width's when rebuilding a spitfire differential? The one I'm
building right now, I've replaced what I suspect are the original bearings
(Timken England) with brand new Timken USA bearings. In order to reach
the required .004" preload, it will require .012" LESS total shim than what was
in there originally. That seems like a big difference with the only
variable being new bearings. I'm using the same housing, same carrier,
the bearings visually look to be fully pressed home. Anyone else
experience this?
<div><br>
</div>
<div>Thanks,<br>
<div><br>
</div>
<div>Jason Sukey</div>
</div>
</div>
<br>
</div>
</div>
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