I dont use glue to actually mount the wheels, I use a 4mm bolt through the axle and wheel to hold it in place. The wheels in Mini-Maul (my previous bot, at robotwars) were just held in the chuck, and had custom made pillow block bearings at the end of the shaft.
The 2mm ali straps are keyed in the middle to actually hold the motor in place (and stop it from spinning).Oh and the hammer thing just happened beacause I had to undo some glue which the drill-maker had placed to hold the chuck onto the threaded rod. The hammer solved this problem.
And I have no Idea how most other english people do this, but Ive heard most use the same bolt through the axle technique as I do...
Cheers, Ewan