I have two hubs I'm working on, both fronts from early to mid 80's japanese road bikes with typical 100mm dropout spacing. the cups in both hubs look to be in excellent condition. the cones on the other hand are pitted, and rather unfortunately one of the axle rods has stripped threads on one end due to over-tightening.
top set: from a Sunshine 5345 hub. on this one the QR axle is badly stripped on one end. it's a 9mm 106mm with 26 TPI threads.
bottom set: from a Miche Competition hub. this QR axle is fine, so I would only need to replace the pitted cones. it's a 9mm 108mm with 1M threads. and yeah, i know the cones don't match exactly; I've assumed that's from an earlier cone replacement.
where from might I be able to order compatible replacement cones and/or axles, that I can be fairly sure will work with these hubs and be of reasonable quality? the cone races from both brand hubs look to be the same, so I'm going to make a hazardous guess that these were the most common cones back then and that they should be truly easy to find replacements for. (ha!) if a cone or set doesn't mention that it's for a specific hub, should I assume that the races are of this common standard? was there a common standard (for japanese bikes from this time period at least) even?
I'm sure I have some flexibility in the axle length; anything between 104mm and 110mm should be more than safe.
btw, my estimates for the TPI on both axles may not be correct (although I'm fairly certain about the 1M one), but I do know that they're different because they don't line up to each other and the cones only screw on a few turns before stopping when swapped between them. if I'm able to replace them in sets though, I don't need to worry about the threading of course.
You should be able to go to your lbs and pickup new cones and or axle for around $10 . Yes they are very common and still easy to get at your shop.
I was in touch with them earlier and they didn't think they had it in stock but might be able to specially order something if I brought in the hub to show them. I like the place, but they're more of a showroom than a parts source. still, I will bring them the hub in the morning in the chance they'll find something in the back room.
for the Sunshine, the cones are 15.6mm in diameter and 10.5mm in length, so CN-RO25 plus a spacer would work I think. for the Miche, the cones are 15.9mm in diameter and 11.0mm/12.0mm in length, but CN-RO25 could also work since I need to replace the axle rod anyhow. I didn't see a 26 TPI cone that was very close.
because both hubs have dust caps that attach to the hub body rather than the cone, I probably can go a little either way regarding the exact diameter, so there's probably multiple choices on that page that would work, assuming there's nothing special with the races between different cone choices that I am not aware of.