CJ Meyers posted:Holy cow! When we mold (plastic) parts, we X-ray them to detect voids in the castings like this. I've got a box of old warped Std ga wheels, and an atlas 4800 lathe. I should cut a few open and look inside.
Quite the voids there, aren't they? I chucked it in a three-jaw and had a live centre up against the axle-hole to hold it. All worked out ok. I made a couple of small saw cuts on the "tire" and pried it off. I have three more old wheels if this one goes south, but I suppose I should work fast. Removing metal might cause more warping. 
