I'm currently putting an old crankset on to a bike with new pedals. My problem is that I can't get the pedal axle off the crank, as seen in the picture below. I've been turning it clockwise to try to loosen it off, but I've had no luck. I've tried putting it in to a vice, but the flats on the cone aren't deep enough. I was thinking about filing the cone all the way down to get it in to the vice, but that would take some serious filing. Any one recommend that, or suggest other ways to get it off?