Summary

If you succeeded to print a planetary gear model which is that smooth that you can turn it in overdrive, then you can use this part to turn it with a drill.

The original planetary gear model reduces speed by 1:4 per stage. So in overdrive it spins 4 times per stage per revolution. So with two stages, one turn will rotate the other end 16 times. So if you spin it with a drill with like 1000 rpm you will end up with 16.000 rpm!

• Note that this only fits on 200% scale printed planetary gear models!

• If you try to use this with a drill, do so at your own risk and be very careful, since there is a big chance your planetary gear model will explode because of the RPM's.

For the grins i left some teeth of the original tool which i used for this sticking out of the back.