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It's the drive roller out of a large, professional-gymnasium-quality treadmill
I took apart a couple of years ago. It was a little over 5" in diameter,
and just under 1/4" thick. The plaz made quick work of one end,
and then the center shaft popped out. (Itself a bar of 2" mild steel.)

Then it was a simple matter of quartering the resulting pipe to get the skirt sections.
Simple? Sure- just lay a chunk of angle-iron on the pipe,
and it's automatically aligned perfectly parallel. Mark, and cut.





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Information contained in these pages is for reference and entertainment purposes only.  Our methods are not always the best,
quickest, safest, or even the correct ones. It's up to you to know how to use your own machines and tools.
Keep your fingers away from the spinny blades o' death and you should be all right.