Although I've not worked on this part of a 950 before, let's assume that Hamilton's White Metal spring will go around the arbor with no adjustment necessary. I'd be reluctant to move the metal in any way...unless an Expert suggested it!You know what Michael, I wanna buy you a beer. I wanna buy you a case of beer.
My assortment of hubs came in from Casker. At a cost of $33.
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$33 dollars. I am currently over the moon.
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I believe a bunch of these others are for 18 size motor barrels and a bunch of them for the 12 size, but I think at least a few are for the newer 952 or 950B with the split barrel plate maybe.
In any case, I'm going to put these away for now and install the new hub later when I've calmed down. Considering I saw a guy selling the metal washer top from a 950 barrel on eBay for like $75, I believe I managed to land a once in a lifetime deal here. And now I have these other barrels to sell to anyone who might need them, but this single 950/952 hub that came in the assortment is mine.
For the record, I reached out to lot of places trying to find this hub. I never would have expected to find one in this assortment. Never in a million years. I think you sent me some good luck, Michael!
On a different note, my own theory about why the original hub cracked might be because the large amount of pressure put on this thing over a hundred years. I'm sure Hamilton never considered wear and tear after a century. It's not like they could run a simulation of millions of windings through the computer to see where the highest stress points are. Which is probably why the conventional wisdom is to not unscrew it from the ratchet wheel. This replacement hub looks like NOS. Once I screw it in to the ratchet wheel it is never going to be removed by me ever again and repeated windings will just make it tighter. I just need to open up the new mainsprings inner coil so I can slip this in. For that I'm definitely looking for recommendations. I don't want to break the new mainspring.
On something like this, then, I'd go over to the NAWCC or AWI and ask. Someone there will turn-out to be an Expert, and be happy to advise accordingly.