Originally Posted by
Chombi1
The thin brass washers under the screw heads which are unique to retrofriction shifters, are meant to provide a slip0ery surface between the screw head and the lever body.....not friction. Brass is commonly provided between sliding surfaces as sort of dry lubrication.....
Brass is used as a friction plate in friction shifters. "Self lubricating" materials like brass and nylon are normally used for friction devices because they catch and release without galling.
You don't know what you're talking about.