On Fri, Apr 20, 2012 at 8:46 AM, Alistair Bell <albell@shaw.ca> wrote:

> After I replaced a relatively new inside rear wheel bearing the other day,
> I got to thinking about how the grease is supposed to stay in that bearing.
> It is an open ball bearing (17 mm id, 35 mm od, 17 mm thick ,NSK6207 C3 or
> KOYO 6207R) and when you are installing your supposed to pack the bearing
> itself with grease and also add grease in the housing (where the spacer
> is). I don't understand how adding grease to the housing helps, I can't see
> how grease there is supposed to get into the bearing.
>
> So I wonder if using a sealed version of the bearing would be better? They
> are available, KOYO 6207 2RS for example.
>
> Am I missing something in my understanding of ball bearings in this
> application?
>
> alistair
>
   I think you are meant to put enough grease into the hub so that there is
no room for the inner bearing to shed the stuff into the space between the
bearings.   That is what I did.   Also, there are two types of grease, one
is marked "High Temp" or "Disc Brake"...I used that rather than just normal
all purpose grease that could get spun out of the wheel bearings when it
gets really hot.

  Don Hanson