I love using the Jameco gear motors for various projects, but have always had challenges connecting the shaft to whatever I was making. Using a 3d printer (MakerBot Replicator) and TinkerCad software, I have come up with a press fit wheel that pushes on to the Jameco motor shaft. In this instructable, I'll show you how I designed the wheel.
The print file is at Thingiverse.com:http://www.thingiverse.com/thing:23022
The design file is at:http://tinkercad.com/things/0kw42vpDGU8