You mean like this ?.......that picture is not my machine. Both my arms are still in one piece, knock on wood.
As you can see in the picture, I have a feeling someone was shearing using the left handle only instead of the right handle, or both handles at the same time. Operator error is why that happened imho, though cast iron didn't help. Worst case if it breaks, fabricate new arms out of 3/4- 1" steel.
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https://www.manualslib.com/manual/893695/Central-Machinery-43353.html#manual
This model was produced around 1985, so it's around 39 years old. The one I purchased is in remarkable condition. The shear blade was slightly worn on one side of the blade. After reversing the blade, I found it to be razor sharp since it required stitches to keep the tip of my middle finger from falling off. The press brake dies look brand new, The machine was well cared for and oiled preventing any rust from forming. Even with the 40 year old worn blade, it cut thru a 12" wide piece of 18 gauge with a little effort. The brake had no problem folding a 90*. Have not used the slip roller yet.
It's a heavy machine weighing in at 420 pounds. This machine model # 43353 was made for 18 gauge sheet metal as the newer 30" version is rated for 20 gauge. Since I'll most likely use it for 19 gauge, I'm hoping for the best. I've stripped the machine down to check all of the components and give it a fresh coat of paint. Should be up and operational in another week so I can put it to use on the Barracuda for the current fabrication project I have started.
Here are two pictures from the guys house I purchased it from. Front view.
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Rear view.
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