I have purchased these custom made wooden gears. 12 Teeth, 1/2" thick and 2 3/8" in diameter. I am trying to install a timing belt around it. What would fit? It can be open ended, or so about 9 1/2" from gear center to gear center. Thanks!
That's a gear designed for meshing with other gears not for use with a timing belt. It also has a wider tooth spacing than the largest commonly available belts which max out at 10mm. If you have a fairly large 3d printer you may be able to custom manufacture one that would work using a flexible filament but as there is really no way to reinforce it any such belt would be limited strictly to ornamental use.