Helical Gear Fidget Toy

Latest version at https://www.printables.com/model/445635-helical-gear-figdet-toy.

Now has a little sibling at http://www.thingiverse.com/thing:2105705.

!!!DEBURR THE GEARS AND REMOVE SHARP EDGES FROM THE GEAR TEETH!!!
Do not put anything that can get hurt in to mesh point of gears!
Not for young children. If not assembled correctly, ball bearings can fall out.

Meshing helical gear fidget toy with through hole for finger.
Printing two of the same gears will make them mesh at 90 degrees.
Printing one right hand and one left hand gear will mesh straight on same plane.
Same housing for both straight and perpendicular planes assemblies.

Included is an STL for a bearing race dressing tool.
I passed some 180 grit sand paper through the slots.
Pushed it in the the half toroids and rotated back,
and forth to help smooth out ball bearing grooves.

I used PLA for the gears, and ABS for the housings.
The little holes in the housing are meant to receive short pieces of filament.
Cemented together using acetone on the ABS housings and inner cylinder.
Epoxy or any decent glue can be used to assemble the housing pieces as well.
There are a few versions of the inner cylinder.
I had delamination issues when removing it from the printing bed.
A little acetone on a paint brush re-enforced the laminations fairly well.

Spherical 4.5mm(0.177") BB ammunition is used for the ball bearings.

Contained with this package is an OpenSCAD script…