compact reversed cim gearbox and output shaft question

[InFlight]

Originally Posted by asid61

I believe he was trying to drill it out, not press it out with a drill bit.
I've seen videos of people hammering them out and in before, but if it's possible to press that sounds much easier than whacking at it.

I believe most spring pins are hardened spring steel (something like 1080). While you can drill it with a HSS bit, it would be a slow process. A cobalt bit(M42) would be the best option, and still ugly. Drilling it out would definitely be my last choice of methods.