So far the NSK standard grease. In a future revision we might reduce the bearing size a bit, but right now we aimed to have these motors run reliably for a good amount of time (ideally 20k hours). All regular motors tested died in a matter of months (approx 100 hours), wrecking both bearings and...
> How are the bearings set up for axial thrust?
Both bearings are press-fit into an aluminium flange. The much smaller rear bearing fixes the shaft axially (nut on shaft clamping the inner ring). The front bearing is free floating on the shaft (can move it by hand when cold, but not enough to...
We're trying to find the cause of very high losses in a custom high-speed brushless motor. The losses occur at light/no load with a cold motor. As soon as the motor heats up to normal operating temperature (approx 80 deg case) all is good. The motor's rated speed is 12000 RPM (at 1kW)...
