IIRC it is a taper pin.
--- In email@example.com, "cuongnhu2"
I tried to remove a back gear from a 9 inch SB headstock the other
night to no avail. Couldn't get the pin holding the inboard
eccentric out. One of my manuals shows this being a taper pin. Is
it? I didn't have much time to spend on it right then so I put it
off for later. Didn't want to bugger anything up do to impatience.