Mud,
I'm not the expert here but that 2.2Kw (3HP) motor weighs 22Kg before you add the rest of the gear you need to drive the spindle. Most of us here use a Chinese water cooled 2.2Kw spindle that is somewhat lighter and runs up to 24,000 rpm without the complexity of a pulley system and separate spindle. BST Automation (owned by the unlikely named 'Fred') is a well regarded supplier. This link shows you the package...

This spindle includes an ER20 collet chuck which will hold (if you buy a separate set of standard ER20 collets) any tool sized from 1mm to 13mm.

https://www.aliexpress.com/item/7139...348c696fzeIZSW

Kit