Hi Alan, years ago the making of an S blade was a long and unsuccessful process with each person reinventing the wheel, and many had systems that didn't work after all the expense ($300 was an average cost as I recall)
Mike McCain went on to create a very simple chopper system for drums, and showed it in his vdieo... {no longer avail, I am trying to get it into DVD format,} A friend bought a set of these blades made from simple welded angle iron and big screws. I took pics of it disassembled.
Will try to explain:
It has a W shaped base of 3 welded angle iron pieces about 12" tall with a bottom cross piece. Short pipe is also welded to the 3 angle iron tops that a metal rod passes thru.
I called it a "scissor blade" because the short cutting pieces swept past the fixed W like scissor blades do to cut.
then 2 short pieces each of angle iron are welded to a pipe piece with a hole for a bolt to pass thru to grip a solid rod. the W lays across the bottom of a drum, the short pieces sit between the W to spin and when tied to a power source the short pieces spun independently and chopped an entire drum full in less than 2 minutes. Mike stopped selling the blade sets, he was too busy on bigger projects, and he encouraged others to just build their own. I know someone with a little skill could have them made.
May I attach photos to this email? if not will try an upload to the folder.
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Charmaine Taylor/Publishing & Elk River Press
PO Box 375 Cutten CA 95534
www.papercrete.com
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