QUOTE
Did you mean to take the nib out of the pen (or section) - or really mean the feed? Dissassembling an Esterbrook nib isn't a job for everyone...
Regards,
Gerry
Gerry, you're the master of understatement.
The collar often has an indent, that fits a notch on the feed. It's designed to keep the nib and feed from rotating as the nib assembly is screwed into the section. If you just knock it out, you will at the least break this off, and at worst, you could shatter the collar. i.e. you could end up with a junk nib.
FWIW, Giovanni and Martin Smith at Woodbin sell buff sticks. The 12000 grit micromesh side does a super job of shining and polishing up a nib. They work very nicely on Esterbrooks.