... are assembled by motor, reducer, gear box, cutting chamber, drums,mechanical seal, shell, PLC etc. Principle The power from the ... fluid flows through the space between cutters, side rails and drums. Materialsl Cutter and spacer: heat-treated alloy steel 4130 ... Shell and Housings: Ductile cast iron ASTMA 536 l Screening Drums: • Standard: coil made of stainless steel: 304 • Optional: perforated, ...