Three phase motor choice

[Voicecoil]

Hi Kitwn, I've got a couple of machines with those spindles (a 2.2kW and a 3.0kW), and this time around I fancied doing it a bit differently. In my experience those spindles work well up to a 6mm cutter in aluminium, but not much further.

You could look at a Chinese spindle that has better torque low down (likely a 4 pole motor), these are sometimes called "constant power" spindles when they have torque that drops off linearly with RPM.