Originally Posted by rctimer
Sorry for any inconvenience bring to you, you can try to open the motors now, and try to check the question of the items, you can try to uninstall the bearings, if the problem is the bearings, we will resend the bearings to you, to show our honest, we will resend a new motor to you, is it ok? as all of the motors are twined by our workers, not by the machine, one motor may take about half an hour, we just don't want to waste the material, thanks for your understanding in this matter.
Bey the way, which battery and ESC have you used?
Hi, I opened one of the motors with bad bearings. You were right, they are quite easy to open. Easier than I expected. It's OK if you send me new bearings (Three motors have now bad bearings, and if possible, could you send one set of spare bearings too in case the fourth one goes bad too soon?), few circlips and if possible, a new spinner for one of the motors?
What should we do with the axles and outrunners which I had to glue to prevent the propellers from slipping?
You are right that if the motor cores are wound by hand, not by the machine, it is shame to waste good cores which are very time consuming to wind. So I also think that saving them and rebuilding the motors is OK.
The batteries I use are Turnigy LiPo's, ranging from 2400 mAh to 4000 mAh. ESCs are Hobbyking SS 30A escs. The combination works fine except the bad bearings: they run fine and smooth, look nice but make noise and feel bad because of the bearings which makes me afraid of the motors and bearings seizing in-flight.