DIY Brushless spindle

[booski]

Ok, tried turning the PSU down as low as possible. Unfortunately, 10.5V was the lowest and the ESC didn't seem to like it a great deal so it would appear 12V is the nominal. That's still 54,000 RPM. Though, I do think it's considerably less than that because 4500RPM/V is the no load speed and it's only a small motor so I would imagine that under load, even just spinning the spindle it's probably 5-10K less.

Anyone know of any brushless motors that can be had cheap that have a 3mm shaft with a reasonable KV, say 2000KV?

[magicniner]

If you have space could use a lower speed, higher torque motor with a belt & pulleys?
I made an engraving spindle mounting for my milling machine which takes belt drive from the spindle with a 4.8:1 drive ratio giving me a 28 800rpm engraving spindle from the 6000rpm mill spindle.
You can buy round section Poly Belt in a range of sizes and it's fairly easy to cut & weld to size and pulleys are easy to make up if you have a lathe. My first belt has done 12 hours run time at full speed without problems,
Regards,
Nick