Long time lurker but posting after a while now. I'm in the market for a CNC spindle and I had a few Qs. I'll mostly be milling Alu and variants of steel. Once in a while, some plastics as well. Planning to get something like this or this.

  1. Is a water cooled spindle significantly quieter than the air cooled one? The machine is at my house and I don't want to upset my neighbors.
  2. Will this work on a 220V household AC supply (through the VFD of course)? Or would this need a 3-phase supply to begin with?
  3. Will this be torque-y enough to mill steel?