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Needle Bearing Fitment Problem...


BusyLittleShop

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  • Member Contributer

The 5th and 6th generation VFR and RC45 share the same 62x50x25 needled bearing that

supports the rear axle... p/n 91062-MR7-003

I don't know if this was peculiar to just one bearing or this will be

true on all the bearings we order in future... but when I installed my

new bearing into the cassette it would not travel down far enough to

clear the retaining clip... so I removed the bearing and according to

my micrometer it was indeed the right size... however the edge on the

seal side was more square than rounded... I chucked it up in the Lathe

and employed my Dotco air driven sander and ground the edge as round

as the one it replaced... with this mod the bearing traveled far

enough to clear the retaining clip...

uploads...31_51_74363.jpg

RCBearingAlert.JPG

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  • Member Contributer
... however the edge on the seal side was more square than rounded...

Did the bearing have different radii on each side?

Yes... the opposite side seemed to have more radii...

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  • 7 years later...
  • Member Contributer

Thread revival warning!!!

 

Found this old thread in a Google search whilst looking for sources for that particular needle bearing.  From studying the picture above it appears that this is an OEM-sourced NTN bearing, not an aftermarket version (such as that sold by PivotWorks).  That's worrying! 

 

FYI, the RC36 and RC30 also use that bearing, which is a little bit unusual in that it has a seal, but only on one side.  I've heard of people foregoing the OEM bearing (due to expense) and using a standard industrial bearing without the seal, reasoning that the bearing seal has no actual purpose, given the bearing's location within the bearing carrier (and sealed on the outside with a separate seal) means that there is nothing really to seal.  :unsure:

 

Ciao,

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