Finally, A Desktop CNC Machine With A Real Spindle | Hackaday
Don't build a DIY CNC Spindle untill you watch this - YouTube
CNC Milling Machine Spindle [Complete DIY Guide] - CNCCookbook: Be A Better CNC'er
CNC Spindle Kit 48V 200w/300w/400w/500w Air Cooled Milling Motor with 1pc ER11/ER16 Collet for DIY Engraving (ER11,200W): Amazon.com: Tools & Home Improvement