I have a Vex IQ bot that uses the omni wheels. They cause a lot of vibration, especially when the bot is turning.
I wanted to experiment with the Vex EDR mecanum wheels, so I bought a set. When I received them, there were no instructions or information about how the hubs should be mounted. There were two sets, one is locking and the other is non-locking. The non-locking hubs fit into the wheel without problem, but I wanted to use the locking hub. They are a really tight fit. I considered just hammering them in, but was concerned about whether the two of them that are required per wheel would line up, so the axle would fit through.
So the question is how is one supposed to get the locking hubs to fit? I hope there is a better answer than “when in doubt, get a bigger hammer.”