Funny answer is you can use a 10mm round shaft (with or without keyway) pulley, and just use a “really long” grub screw that goes against the flat edge of the shaft. Retaining compound would help.
Check out the flipsky d shafts, those may be the same dimensions.
That’s because… It’s not designed for flipsky motor pulley.lol The dimensions for the shaft is always 10mm x 9mm. I did contact flipsky about their motor pulley. Their motor pulleys is proprietary. I didn’t know.
The only issues with this motor is the set screws(it holds the shaft). The material is weak. It’s very easy to replace. It cost $1.
Oh forgot… no temperature sensor. Since the amp draw is 50amp. The temperature is stable. I guess there is no need for it.