5-stage gearbox, a cool educational tool

Please refer here http://3dprototypesandmodels.com.au/printing-for-stem-subjects/ for a background on this item.

Printed on my Replicator 2 in PLA, this 5-stage gearbox gives a 54.19x increase in RPM and with a basic propeller on the end, can actually create a decent amount of wind.

The tolerances on this part are quite large since I did use PLA, the fits may be loose on ABS.