Blohm Simplex Surface Grinder Types: 5, 7, 9, 11 & 75. Manual Blohm Surface Grinder "Simplex" Models 5, 7, 9, 11 & 75. Operating Manual and Maintenance Manual with Hydraulic Plan. Manufacturers: Blohm Models: 11 75 7 9 Simplex 5 Contents: Operators Manual Maintenance Manual