Hi Florianz, I hope you don't mind if I post this in your thread, I thought it could be useful for anyone researching TP Power motors.
I got another loose motor shaft on one of my TP56xx motors. Got the motor apart and it looks like the TP5670 shaft was produced by same drunken hobbiest riding a rollercoaster as with
my TP5660... I really like the copper content of the TP Power motors and the fact they are 6 poles, but maybe they should start selling them as a kit or 80% RTR version, as the way they attach the rotors to the shafts sucks big time and I would do a better job at it myself...
Besides the sloppy (and what appear to be post-production) flat spots, you can see by the wear mark on the front, that the (minuscule) grub screw wasn't even on the flat spot. In addition, the rear grub screw was not tightened at all. That rear grub screw is actually unreachable now and if it was ever tightened, that could have only be done
before the magnets were attached to rotor.
Anyhow, I reattached the rotor to shaft with some loctite 648 (thanks for the advice Lizard), designed for the bonding of cylindrical fitting parts. Product description even mentions use for holding rotors on electric motor shafts, so hope that it works. It's curing now. To be continued :).
