The invention relates to a laboratory mill (1) for comminuting grist, in particular configured as a cutting mill or cross beater mill, comprising a device housing (12) having a grinder housing (16), wherein the grinder housing (16) defines a grinding chamber (32) and has an axial end face (16a), a rotor-grinder in the grinding chamber (32) of the grinder housing (16), wherein the rotor-grinder (30) comprises a rotor (34), which defines a rotor axis (X), and at least one counter-element (36), wherein the grist is comminuted between the rotor (34) and the at least one counter-element (36) when the rotor (34) rotates, a grinder drive (2, 4) for driving the rotor (34) in the grinding chamber (32), a grinder housing door (18) for closing the grinder housing (16) at the axial end face (16a) wherein the at least one counter-element can be inserted axially into the grinder housing (36) when the grinder housing door (18) is open.

A slurry macerator (1) comprising a housing (2), a slurry chamber (3) in the housing (2) for receiving slurry from a slurry inlet (6) on the housing (2), a rotatable cutting plunger (4) in the slurry chamber (3) for macerating slurry, a plurality of slurry outlets (7) on the housing (2) for discharging macerated slurry from the slurry chamber (3) wherein the cutting plunger (4) comprises at least one cutting blade (35) having cutting teeth (9).