Chinese 300W DC spindle - is the spindle shaft grounded?

[HankMcSpank]

Hank the one in the video as a kit is exactly as the one i bought. I've only run it up at 40v as that is the pwm driver o bought to use for it. Looking at it was a disappointment when it arrived. Powering it up was a different matter. It ran rather smooth with no noticeably run out. i will change some of the parts on the driver so i can run it at a higher voltage when i get round to finishing one of many projects.

Cheers for the feedback.

I'm thinking if the fan is removed, then it ought to run much quieter (& possibly smoother) .....it'll be interesting to see how hot it gets & how fast with the fan removed. (the Zen Toolworks spindle doesn't have a fan on the top)...I typically only use mine for 20 minutes stints max - if it runs too hot with the fan off, then I'll even considering mounting a separate larger low noise DC fan suspended over the spindle somehow or other ...this can spin at far lower RPM vs the spindle's & yet should still keep the spindle cool.