I have an old stator from a motor I took apart and it is made of many rings of steel, welded in a few places to keep it together, similar to how transformers are welded.
It obviously has the spaces to hold the windings inside the core so IDK if those will pose a problem or not and I'm sure I could put something inside it like a solid steel rod and weld it in place (could probably get near perfect fit). I could also cut off the "legs" that make the hole. The size is to big for one transformer so I would use it in 1/5's to 1/3's to make it reasonable, but still large.
I was considering making a variac with this if this is possible as I have the wire to make one.
It obviously has the spaces to hold the windings inside the core so IDK if those will pose a problem or not and I'm sure I could put something inside it like a solid steel rod and weld it in place (could probably get near perfect fit). I could also cut off the "legs" that make the hole. The size is to big for one transformer so I would use it in 1/5's to 1/3's to make it reasonable, but still large.
I was considering making a variac with this if this is possible as I have the wire to make one.