Hi guys, this is my first post around here. I'm building a hobby cnc and i need some data about these spindles. As an example:

https://pt.aliexpress.com/item/2-2kw-spindle-kit-220v-380V-80mm-2200w-CNC-milling-spindle-motor-2-2kw-inverter-80mm/32807208836.html?
(Couldn't find the resource here in the post section to give an "dns" to the link )

Has anyone used those spindles ? Tested which RPM they start to have the lowest torque ? Which frequency ?