— Gehl hammer mill screen. Thread starter LorenMN; Start date Jul 17, 2015; L. LorenMN Member. Jul 17, 2015 #1 ... Other idea I'm thinking about is buying a piece of perforated steel plate and having it rolled at a local metal fab shop that has a big 3-roll roller. I think they could match the radius of my old screen, only problem would be that ...