Replacing bearings on an m952 BB?

[ishaw]

Apologies if asked and answered but can this be done! They got the bearings in there somehow.

I don't want to destroy a BB to find out, hoping someone may have tried.

My theory is that it could be possible to do:

Remove threaded cup.
Place BB in a device that allows the axle to be pushed downwards, my theory is it should bring the bearing out with it.

Repeat on the other side.

Will this work?

There's probably the small matter of finding equivalent bearings to refit.

 

[old-school]

my friend did it, so i suppose it's doable..

 

[bikeworkshop]

The trouble is that the ball bearings wear slower than the races they are running on, so I doubt you'd get more than a 20% improvement.

If you can get it apart to clean it though, you might as well replace them, but the result could easily be disappointing

 

[ishaw]

I'm quite keen to give this a go as I've one which has no play but bearings are running a bit dry . How was it taken apart do you know? Not wanting to ruin anything trying.

 

[qianas]

You’re correct in thinking that the axle can be pushed downwards to press the bearings out. A bearing press or similar tool can help apply even pressure. Make sure the device you use allows the axle to move freely while pushing against the inner race of the bearing, so the bearing comes out intact.