4" Heavy Duty Mecanum Wheels

[craigboez]

If you have a way of indexing around you could put a slot in the main base and put the roller mounting tabs on that.

I considered this, but didn't like the idea of having a separate hub and fins for a few reasons. Strength and additional fastener weight were two, but primarily it was because the "holes" in the hub would actually be slots because of the endmill geometry, and I didn't want to put a rectangular fin into a rounded-end slot.

With a few well designed fixtures the "hub with spokes" should be machinable on a 3 axis machine, all from one piece of aluminum. I think. CAM analysis hasn't begun yet.

I'm actually considering machining one and using it as a master to create a mold from. Depending on how strong that urethane is, especially if fiber reinforced, it might just be strong enough.