Has it be done before?
 

So a few months ago I snapped the pinion shaft on a VXL 3500kv motor. I ordered a new rotor and all is well. Bought a couple more used 3500's and I managed to depolarize one of the magnet's due to excessive heat...:whistle:

Question: Can I change the good magnet from the broken pinion shaft rotor onto the good shaft with the bad mag? I assume they are glued and or pressed on? Has anyone successfully done this kind of repair? If so, how did you go about doing it without causing damage to the magnet?

Thanks!

That would be tough... I would say no.

The glue they use can only really be removed with lots of heat, so... catch 22. If you have a hydraulic press you might be able to punch the shaft out of the magnet I suppose, but good luck is all I can say.

The magnets don't like being machined either. It would really be risking it if you tried to hammer it off or something.

Heres some info from kjmagnetics.com. The sell the same type of magnet used in brushless motors. You won't be able to buy anything for your motor, but they have some fun magnets and good info.

-17. Can I cut, drill, or machine neodymium magnets?
The Neodymium Iron Boron material is very hard and brittle, so machining is difficult at best. The hardness of the material is RC46 on the Rockwell "C" scale, which is harder than commercially available drills and tooling, so these tools will heat up and become damaged if used on NdFeB material. Diamond tooling, EDM (Electrostatic Discharge Machines), and abrasives are the preferred methods for shaping neodymium magnet material. Machining of neodymium magnets should only be done by experienced machinists familiar with the risk and safety issues involved. The heat generated during machining can demagnetize the magnet and could cause it to catch fire posing a safety risk. The dry powder produced while machining is also very flammable and great care must be taken to avoid combustion of this material.

Well that sukx... oh well, worth a try.

On a positive note, I didn't depolarize the magnet, one of the motor wires popped off causing the horrible clunking and squealing noises, lol. All is well once again.

Thanks for your input none the less!

Cheers.