Replacing vertical guard pin on single roller pallet fork/lever?

[mbwatch]

I have a 6 size Elgin, early 1890's and somewhat uncommon 15 jewel for the size. It has this beautiful mustache pallet fork. After replacing the impulse jewel I was troubleshooting a lockup in the escapement that I thought was going out of action (overbanking) due to a fault with the guard pin. It was actually due to incorrectly adjusted movable banking pins as I now know and have solved.

But in the process, I broke the guard pin flush with the top of the lever. I have a full spare movement with the lever pictured below, but I want to keep the spare complete and repair the original lever if I can. I am guessing that I just need a brass taper pin fit in and filed to length. This looks to have been a straight vertical bit of brass, not having the "?" curve found on some other American single roller levers.

I have a lathe now, I have files, I have brass stock, I think I can probably manage making a tiny pin to stick in here if I buy a small enough collet. But what can I use to punch out the old broken pin? It is so small, much smaller than any tool I have or any staking punch. It is broken off flush, so nothing protruding to press on and I'll need something smaller than the hole. I would guess it is around 0.20mm? Too small for my jeweling tools.

Pictured is the intact spare. The broken one is actually in the running movement, working fine as long as I don't bump it around in ways that necessitate having a guard pin. Thoughts on how to push this tiny thing out? Maybe a pivot drill in a pin vise? I don't have any.

[nevenbekriev]

Actually, it is easier to drill the brass in the steel hole. At some point, the piece remain will get out. No need to make the pin in lathe. Use tapered pin like one for hairspring pinning. One is easy to prepare out of brass wire with close diameter.

[mbwatch]

10 minutes ago, nevenbekriev said:

Actually, it is easier to drill the brass in the steel hole

I will attempt to order some small drills.

[mbwatch]

Success without drilling! I realized the brass pin couldn't be too firmly fit into steel in any case so I arranged it on a staking block and pushed the broken pin with a ball head sewing pin Next to see if I can fit a replacement. I measure 0.23mm tapering to 0.20, and about 1.15mm length.

[rehajm]

…sometimes syringe needles work, too

[mbwatch]

4 hours ago, rehajm said:

…sometimes syringe needles work, too

Syringes as pusher tools or as replacement pins?

I took a first try at fitting a new pin. I have a huge bag of tiny brass wire segments I use for heat bluing. They are flat or rectangular so I tried stoning them closer to a round taper with a pin vise and India stone. The taper is a little too pointy and severe so will probably redo this but I am pleased with myself for repairing a 135 year old part.

[rehajm]

6 hours ago, mbwatch said:

s pusher tools or as replacement pins

…as a push too. They can be quite brittle but a larger gauge can a piece of brass like a hairspring pin.