Rostock Mini Engraver from RC motor

Motor: D2632-1000 kV or similar with 2 mm shaft output
optional additional bearing 8 x 3.175 x 4 mm for endmill bit support

see, how it works https://www.youtube.com/watch?v=H33XEeS-if8

all parts mounted on magnetic platform http://www.thingiverse.com/thing:1790429

0.5-3mm Small Electric Drill Bit Collet Micro Twist Drill Chuck Set
http://www.banggood.com/0_5-3mm-Small-Electric-Drill-Bit-Collet-Micro-Twist-Drill-Chuck-Set-p-952211.html