IFI Traction Wheel stationary?

[Madison]

The IFI Traction Wheels are designed to be run on a "dead axle". They're furnished with bearings on each side of the hub for this purpose, so the hole in the sheet metal is 1.125" or so. They're not designed for a press fit and I doubt you'd have much success with such a scheme if you were to manage it.

If you'd like for the wheel to be on a "live axle" -- turned by a key in a keyway, for example -- I'd recommend that you purchase either the AndyMark Key Hub or their Hex Hub. These bolt onto the IFI wheels using the same hole pattern they provide for attaching sprockets and fit through the existing bearing openings easily.

The overall width of the wheels is about .5" larger than their spec'd size -- so 1" wheels are 1.5", etc. There are CAD models of all of the wheels available on their website at ifirobotics.com