Replacement axle for when your kids over torque them (and they will, the gear set guarantees it). Unscrew the side of the axle shroud and carefully remove the axle, the replacement is a perfect fit.
It's important not to make this too tough as it's breaking is what saves the gear train from destruction.
Prints fine horizonal or vertical with build plate only supports and a brim. Does not need supports.
The author marked this model as their own original creation.