[mactec54]

Hello. I am newbie in CNC world. I am finishing my cnc build: It has a Strong Hold Pro frame with 1000x1500mm frame. Now I am trying to decide which spindle will be best for wood and aluminium work. I am between this two spindles:

https://www.aliexpress.com/item/1005...563512304%21sh

This is a G-Penny, but you can choose between: 400Hz - 12000Rpm (I Understand this is a 4 Pole version?).
800Hz - 24000Rpm (I Understand this is a 4 Pole version?).
400Hz - 24000Rpm (I Understand this is a 2 Pole version?)

What are the differences between them? Which are the advantages of 4 poles vs 2 poles? More Torque? Is the 400Hz - 12000Rpm the same spindle that 800Hz - 24000 and both could do the same with a 800Hz VFD?

https://www.aliexpress.com/item/1005...331842037%21sh

This is my second option: G-Penny 1.5Kw 400Hz 24000Rpm 2 Pole

The question is that actually I only have a 220v Single Phase with 20-25Amps available for this setup. Would be possible to make the 2,2Kw spindle work with less current from the VFD as it was a 1.5Kw spindle? If possible, limiting current in VFD there were loose in Torque? If possible I prefer this 2.2Kw Spindle over 1.5Kw Spindle because price difference is not so big so in the future I could get more Amps (current) for the 2.2Kw spindle.

Thanks in advance.

@ 25A you can just scrap by with the 2.2Kw.

4 Pole should be better 12,000RPM is where it's max Torque will be though, with the 2 Pole the max Torque is at 24,000RPM.