This is from the infamous E. Ingraham steel plate movement w/o brass bushings. This is the escape wheel arbor pivot that was running in an unbushed steel pivot hole. I was expecting the pivot to be rough so I took a light cut with the lathe to true things up before polishing. I then notice what looked like a hairline crack along the length of the pivot. So I took another cut and, and then another and instead of going away the "crack" got bigger and bigger until it looks almost like a keyway. What the heck is going on here? Anyone ever seen anything like this? Obviously it has to be repivoted. Apparently arbor continues the flaw because I had trouble getting a true hole. I'll use an oversize plug and turn it true after inserting.
RC
RC

