I have a BLDC that is frozen. It has a brake, but it clicks when deenergized. Also if I forcefully turns it, much more torque than the 2Nm brake force needs to be applied. My suspicion is it has a frozen bearing. That about figures with the necessary torque.
I bought it from eBay, and would rather try to fix it than return it (freigth cost). And thus I don't know how it failed, it was sold as fully functional.
I would like to pull the front cover with the bearing and fixed part of brake that is attached to front cover. I know I have to apply deenergizing current to the brake while dismantling. But how can I keep the magnets from pulling up against the stator when I remove the front cover. I thought about suspending the rotor between centres while keeping the body fixed. I assume this will work as long as it's firmly fixed. That will let me inspect without doing any harm. But what if it is the front bearing, and it needs to be exchanged? I guess you see there is a problem. Do I contact a magician that knows the coupled ring trick?
Anyone out there that know how "the pro's" do this, or have a bright suggestion? Please indicate if you know or guess, but I will welcome good pot shots as long as I know that's what it is.
Why not chuck it, and try finding another? Well a 2Hp cont. 10Hp 20% motor with that low weigth would be as close to a perfect spindle motor as I can get on my budget. I'd spend some hours fixing it if I can.