Punching out roll pins using nails of the same diameter as the pin worked in some cases. If the pin was stuck too tight the nails would just bend. Some times it would take several tries with more nails to get results. Finally I broke down and bought a set of "Pin Punches" that work a whole lot better than the nails. They don't bend like the nails do, instead, if they meet too much resistance they will shatter. While hammering a small punch to punch out a small pin that was fighting me, it shattered, sending small sharp pieces flying, leaving only a very sharp stump where the punch handle tapered down to the punch pin size. Fortunately it didn't cause any injuries, but this is another example of why wearing SAFETY GLASSES is good shop practice for what even seems to be the simplest job.  PROTECT YOUR EYES.                                                                                                      Bill Damm