Roll Crimping

[Eldon Goddard]

Edgar thanks for this post. I attempted to improve the bpi by adding three more roll pins on my 8 ga crimper but I believe the internal geometry is just not right as the crimps still dont turn out correct. I might have to order that Nick Ross one in 10 ga.

[edgarspencer]

Eldon, I also have a BPI 8ga. roll crimper, and, like you, am not happy with it’s results. The number of pins certainly helps getting the rolling started, but the coarse finish of their tool causes a falling of the edge, square or otherwise. I couldn’t be more pleased with the Nick Ross tool.
I like the collet fixture on your mill. Is it R8, or 5C ? Does it also rotate? I have an old Brown & Sharpe dividing head with collet holding but I can’t seem to locate correct (new) collets, and dividing head jobs take me twice as long because I have to keep refreshing my memory on rotation/ degree increments. The superspacer is too large, from OD to workpiece.

[Eldon Goddard]

It holds 5c collets. It doesn’t rotate but threads down and locks the collets in place. I have one for hex as well. The machinist at work showed me today we have a hardinge indexer for 5c as well.