I am working on a gearbox for 3v hobby motors, and needed a model of those motors to design around so I made this one. I worked with the drawing from here, which is partial and may not represent all variants of all manufacturers.

I did not try to print it as it is meant to help design around rather then be printed. Still, I've uploaded step and stl versions just in case. I am uploading this model for other who may need it to design around.

If you happen to have a more complete technical drawing of such motors, I would love to see and update my model. I hope to check for differences between manufacturers, and if necessary - parametrize the model accordingly.