Cornell’s Chopper Pump is designed to chop solids. The standard casing, made of ASTM A536 grade 65-45-12 ductile iron, withstands all of your tough applications. Everything about the pump is has been built and constructed to tackle hard jobs. For example, the replaceable cutter bar is made of T1 tool steel heat treated to a minimum of 60 Rockwell C hardness, and the cast steel impeller has also been heat treated for increased durability. The Cornell Chopper pump series performs in all heavy-duty applications.