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I should have linked this to begin with:
http://straightrazorpalace.com/workshop/106306-repairing-pivot-hole-blade.html

I got mine in a hobby store that primarily deals in trains. There are half a dozen sizes that are all sized to fit inside each other right down to the 1/16th rod.

Funny thing is the proprietor...

I've drilled one (but have yet to put on scales) and expected it to be brutal. It wasn't in the least, surprisingly easy with a basic 1/8th bit that didn't need to take out too much metal. With a...

Ingenious but I think the method of inserting brass tubing would be better. Even if you have to drill it out slightly, it would be less likely to shift or wear out. For very large holes you can...