Can some of you machinist explain to me how to polish a collet. I have a sinclair neck turner, and the only way I can use it is to run my cases in a mouth expander. But after running my cases thru my FL die, I have one heck of a time getting my case back out of the expander without pulling the mandrel out. All these are from Sinclair Intl. They suggested a polish the mandrel in a drill. I have tried 300 grit sandpaper, but there has to be a better, faster method to smooth this down. I also would like to polish my collet die from Lee for more neck tension. But I don't seem to be removing any material. I would like to remove .0005" to .001".

why dont you bring the stuff you mentioned with you next time we hook up, we have all sorts of polishing things in the machine shop where I work, including dremel polishing wheels, jewelers rouge, etc, plus if we have to I can put it in the lathe, and polish in there. I dont know exactly what you are talking about, Id have to see it, to figure out the best way of doing it.

I take ya up on that if I can't get it tonight. I am stopping at Napa on the way home and picking up a crocus cloth or emery paper.

go to www.sinclairintl.com and I have a mouth expander die. Basically to turn the necks, you have to open the mouth on the brass a tad more than your expander ball does on a FL sizer die.

http://www.sinclairintl.com/cgi-bin/...-XX&type=store

Mossy, I used some very fine steel wool and got her polished nice. I don't care what sinclair says, they need to be polished. I had one tech level with me and say everyone complains that they are pulling out the mandrel and you have to drill a little dimple in it to keep it from coming out, and suggested polishing. Others say they never heard of the problem.