How do I remove the front axle from a sealed bearing hub?
The wheel has sealed bearing that are pressed into the hub. Your axle is likely being held in by the bearings. The axle has flanges on the inside that the bearing is resting against. You can try tapping on the end of the axle with a soft faced hammer or even a block of wood. This should dislodge the bearing from the hub. This will also damage the bearing. I would look for a larger box and avoid the hassle of buying new bearings and the tools needed to install them.