60mm Omni Wheel (V2)

This is a design for an omniwheel that can be 3D printed with a cheap hobby printer.

The design was made in FreeCAD and source is available on GitHub: https://github.com/hairymnstr/OmniWheel

The design was created for use with the Pimoroni Micro Metal Motor so has a 3mm hub hole.

To assemble one wheel you will need:

• 10 x rollers (printable part) recommend TPU
• 2 x hub sides (printable part) recommend PETG
• 12 x 25mm M2.5 Pan head screw (I used Westfield A2 stainless Torx head)
• 10 x M2.5 narrow nyloc nuts (I used Westfield DIN985 nut)
• 2 x M2.5 full nut
• 1 x M3 square nut (for the grub screw)
• 1 x M3 x 6 (or longer) pan head screw for a grub screw

Print two of he hub sides and place them back to back rotated by 180° so the four through holes line up.  Secure the two hub pieces together with two M2.5 x 25 bolts and push the full-nuts into the hex recesses.  Fit the rollers one at a time with the M2.5 x 25 screws and nyloc nuts.  Finally push the square M3 nut into the hole and secure the wheel to an axle with an M3 grub screw.

Note: This is now a version 2 of the project, the first one had much thinner rollers and didn't have a very smooth profile once assembled (I should have modeled all the nuts and bolts!).  The original is still in the source file on GitHub.