Twin counter rotating blade circular (skill) saw?

[Oughtsix]

anybody used such a thing? What would the purpose of this tool be?

[Andy]

Cutting a car in half? I vaguely remember hearing about them from a Junkyard Wars-type TV show. I think Craftsman used to make one. If someone has used one, I'm curious - are the blades slightly different diameters? Or how are the blades close enough together to effectively cut a single kerf, without the possibility of hitting the counter-rotating teeth? Andy

[Leon]

Sears has offered this as Craftsman tool on occasion.

[B A R R Y]

The counter rotating blades help P-Factor and stability and if one blade stops spinning. Oops! Those are propellers...

I would imagine that the tool ends up working like a "nibbler", with the blades taking small bites and opposite forces offsetting each other. I would think it would work well on thin metals and plastic, and not bend the finished edge.

[Nova]

"Opposed blades make the cleanest cut you can get in plastic, wood, aluminum?even stainless steel."

Do I win? ;-)

[Oughtsix]

I will award you the prize if you have used one and can tell us about it?

Thanks for the relpies!

cut you can get in plastic, wood,

[Charley]

Hometime had one of these that they used in 1 episode and it was never seen again. Sparks were visible when they cut a board with it.