I cut down several sets of the double flange rollers on a lathe, tough and slow, but worked ok. The shavings that came off were very tough and very sharp, the slightest touch and they would cut.
Thanks Josh I had a friend with an old lathe that could not even make a scratch on the flange. I guess I'll take them to a machine shop.
Larry Diamond
You'll need carbide tip cutters to even touch these.
Kevin