I know it is not quite the specific question you asked, however Cast Iron Crack and Thread repair is possible without welding.
If this is not what you were looking for, perhaps others can use it to restore something else that is not available when they have a cast iron crack.
I helped do this type of repair 20 years ago with a similar product to the Lock-N-Stitch method that is illustrated in the series of three YouTube videos I cite below.
We did this nature of crack repair for a 8560 John Deere tractor with a block that froze and cracked the side of the block. It was in a 1 year old tractor that was bought at auction for a fraction of what its value otherwise would have been. Replacing the block in a 1 year old tractor would have been astronomical.
My late father-in-law at the time then used it on the family cotton farm (with the proper antifreeze installed) for three years before selling it to a neighbor for twice what he paid for it originally at auction. The neighbor still got a great value on a proven tractor with very little hours on it.
This type of technique has been used in machine shops for decades, and some very rare vintage engines and other equipment has been restored to service in this manner.
I haven’t tried it on a 10E or 10ER headstock yet as I have never had one crack but I can certainly foresee it working though.
Again these videos are not of the product I used 20 years ago, nor did we use the lock solution this company illustrates now.
We did not need to use the jigs they use to space the inserts. We drilled a hole just beyond the end of the crack, put in a self-tapping pin which we broke off and ground flush.
We then center punched a new center for a new hole that would intersect part of the plug we just installed which locked it in place and repeated it until we filled the entire space.
We used a pin descaler tool and allowed it to peen the surface which resembled the grain of the casting and painted it. You could not see the repair. It never leaked in 3 years of farm use, and to my knowledge is still running 20 years later.
A machine shop should be able to point you in the right direction, or do it for you.
These three YouTube videos are necessary to see the entire process and for some reason they don’t auto play in sequence. YouTube likes to substitute other videos at times.
Initial repair of crack
- using their lock solution on the crack
- Thread repair insert
They end abruptly but are complete when viewed in sequence.
For pricing on their crack repair supplies and tools contact them at email@example.com
or 800 736-8261 or 209 632-2345
Again that is not the company we used 20 years ago, but they are reputable and have a success story in doing just what you would need.
I was PM'd a question which I answered but for those who might have wondered, No we did not take the block out of the tractor. We were able to access the side of the block without any major disassembly, repaired it in place, and saved 10's of thousands of dollars opposed to a new block and time it would have taken to remove and install it. We did the whole job with tractor outside in about an hour, aside from painting.