[Fot] variation in Timken carrier bearing width?

[Jason Sukey]

Aaron,
     Funny you should mention this, as I'm currently going round and round
with RockAuto.  I ordered 6 of the Timken bearings (15123) - 5 of them look
legit, but one of them is clearly different.  Although the box appears
identical, the bearing came wrapped in plastic differently, doesn't
actually say "Timken"; only says "China", and feels awful loose compared to
the other 5.  Rockauto tells me that this is still a true Timken bearing.
It's obvious that it's not, but I may just have to write this one off as
they won't replace it.  Glad I purchased extras.

May not be a true "counterfeit" bearing, might be a case of a dishonest
customer return that was placed back in stock.

Jason

On Thu, Sep 29, 2016 at 10:21 PM, Aaron Johnson <hpspitfire at gmail.com>
wrote:

> 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 at 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 at 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 at 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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>>
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