Comments by "Dennis Young" (@dennisyoung4631) on "Old School Repair | Experience Machinist Rebuilding Wrecked Crankshaft From Main Journal" video.

  1. I might be able to give some insight. Going by how the two pieces of the crank-to-be-welded are machining, it’s some hard material, and probably some kind of alloy steel. This kind of material can be tricky to weld, especially when it’s in a heat-treated state. You will probably need pre-and-post heat to weld it decently, so it does not crack - as well as the right kind of rod - and the whole process will need to be done to very exacting standards of care and attention to detail. The workpiece will then need straightening, etc, after it’s been, at the least,stress-relieved.
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  2. And, in many cases, these people have two choices - the part’s no longer made - both of which involve a lot of labor: 1) the process shown here. 2) make a new part entirely from scratch.
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  3. Addendum to above: thus far, NONE of those things I mentioned are being done, and I’m suspecting the rod in question is analogous to a type 6013 - as those can run decently on AC, and I’m suspecting that welder is akin to an oil-cooled industrial grade “buzz-box,” sort of like an extra-heavy-duty Lincoln “tombstone” welder. The workman appears to be a good welder, though - beads look excellent, far better than anything I’ve ever managed.
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  4.  @JoshJarrell-t9t uh, this looks like it’s forged. Cast iron has narrow parting lines, and this has wide ones - like you get from a forging die.
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