In this video I built a mini cnc kit and tested it with wood, acrylic, aluminium and fr4 pcb material.

Banggood 3018 Mini Cnc Router Kit https://www.banggood.com/custlink/K3m...

ER11 collet holder https://www.banggood.com/custlink/DDK...
(To install the collet holder, heat it up and tap it onto the spindle motor shaft)

End Mills 1 3mm https://www.banggood.com/custlink/KG3...

22mm surface planing bit https://www.banggood.com/custlink/vGv...
(Use with an ER11 6mm collet for spoil board surfacing)

http://www.techydiy.org/banggood3018...
https://github.com/trasz/grblControl
http://easel.inventables.com/
http://flatcam.org/

Other mini cnc videos:
Eleksmill    • Eleksmaker Eleksmill Cnc Mill  Route...   (Best for pcb milling)
3018MX3    • Sainsmart Genmitsu 3018MX3 Mini Cnc ...   (For Mach3 software)