Stuck lock-nut on one side of the axle, can't push the axle out from the other side So, I have a stuck lock nut on one side of my front axle, and I can't seem to get the axle out pushing on the other side. I need some pointers on diagnosing and repairing this.

The bike is a Merida Speeder 300, and the product page lists the hub as "Bearing disc". The bearings are cartridge bearings, which means this answer doesn't help.

Here's a shot of the stuck nut:



I believe the cause of my troubles is that those outward-facing ruffles have been tightening the nut.

The other side looks like this:



There's nothing on the axle where a wrench could find purchase.

The nut and assorted washers that came off are these:



The other side of the nut is flat. Only the nut is threaded, and it's the only one that has flat sides for a wrench to grip.

What I have tried so far is to grip the free end with a pair of pliers, but I didn't get a good enough grip to get the other nut loose. I have tried to push the axle out from the free end, including whacking it with a rubber mallet a few times, and I even tried to put my weight on the hub with the free end resting against the ground. The axle hasn't budged at all, as far as I can tell, and I'd at least like to have a second opinion before I try to hammer the axis harder than I already have.
As this hub has pressed-in cartridge bearings, it means that the axle sits pressed into the inner races of both bearings and cannot be extracted without some sort of smashing process. This is meant to be done when your are about to change both bearings as they are not designed to be reused after extraction. All in all, it is expected that you are unable to extract the axle at this point.

The lock nut is unrelated to axle being "stuck". If you screw on two locknuts on another side of the axle again, you can use them to place a counter-action wrench and thus be able to unscrew the thing from the other side.