by Clint Orchuk on Sat Jun 04, 2011 12:44 am Chert wrote:I have this stuck-adjustment-ring problem with a La San Marco Grinder SM-90. There is a knob that one depresses to allow the ring to turn. While I am trying to free up the stuck threads, should I be concerned that the knob may not be working and I could damage it by trying to turn against it?
I had the same problem with my Fiorenzato. Nothing would move it. I turned the grinder upside down and soaked it in a TSP solution that was just deep enough to cover the threads. Unscrewed by hand after that.
