I drew up a rough sketch and figured my angles first. I cut the slots into the tubing using our CNC plasma table and a piece of plate as a stop. Having a laser locator lets you really line up stuff like this.
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I already had some 1x2" bar with a hole and a radius on one end to act as a pivot for the top plates. Welded these up with my TIG machine.
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Next,I jigged the pieces up on my table and tacked them all together.
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Speaking of the jig table, sometimes it just really handy for holding that piece in a good position to weld. It made getting into the tight angle a fairly easy.
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I cut out these tabs from 1/2 plate and welded them to a piece of C channel to make the top pivot plates.
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Closeup of the weld. I'd like to get a bit more consistent. I really don't get as much tig steel practice as I'd like.
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We cut out some chain plates and bent up some handles for these.
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Here they are in use. I had to order the chains I want to use with these. They will be welded to one side and attached with the chain plate to the other.
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