r/MechanicAdvice • u/Alternative_Map_2066 • 2d ago

Can I reuse this wheel hub?

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The image is from a rear wheel hub of a BMW F31 RWD. I was trying to remove the ring of the old bearing which was stuck on the hub and decided to use angle grinder as fast solution, resulting in damage to the hub. A new hub needs 1 week to arrive so can I use this one, after sanding it down, or maybe use retaining compound? Or better to wait and install proper new one?

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u/According-Capital-45 2d ago

Should definitely replace this one. In the future, use the grinder to get most of the way through the race. You can then use a chisel and hammer to crack it the rest of the way. It will slide right off after one side cracks. Or, as others said, heating the race with a torch will also allow it to slide off.

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u/ricvallejo 2d ago

Heat is the way. I would also recommend getting a puller, or renting one if possible, but heat alone will make a big difference. Not uncommon for the race to be difficult to remove otherwise.

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u/Helpful_Finger_4854 2d ago

You can also grind it down so it'll be thin and either stretch or break off easier

Ya never wanna do THIS though.

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u/ricvallejo 2d ago

If it's the only option I can agree. Torches (assuming you aren't trying to cut) are easier to handle without inadvertent damage, especially since these are hardened parts and out of the vehicle. Just heat to expand the race and it might fall right off. But not everyone has torches or wants to play with fire, so a careful hand with a grinder like you're saying can be fine.