A method and crushing device for coarse-grained material. The crushing device includes one first axially rotatable grinding mechanism and a second grinding mechanism which is fixed with respect to the first axially rotatable grinding mechanism. The second grinding mechanism accommodates the first axially rotatable grinding mechanism and is in operative connection with the first axially rotatable grinding mechanism for the purpose of crushing the coarse-grained material. The axially rotatable grinding mechanism has one transport channel for the respective material to be crushed. The transport channel includes a first section extending axially and a second section which adjoins the first section at an angle and passes through an outer lateral surface of the axially rotatable grinding mechanism.

The shear gap between a rotor and a stator in a colloid mill is adjusted by translating the stator with respect to the rotor, preferably by moving the stator along a helical path about the rotor, thereby moving the stator's surface closer to or further from the rotor's surface (and altering the shear gap therebetween). Helical slots are provided in the casing about the stator, with members extending from the stator through the slots, whereby the members can be grasped and rotated about the casing to move the stator. Channels allowing circulation of buffer fluid are provided about the stator and rotor to deter ingress of the fluid being processed into junctures between components of the colloid mill.

The shear gap between a rotor and a stator in a colloid mill is adjusted by translating the stator with respect to the rotor, preferably by moving the stator along a helical path about the rotor, thereby moving the stator's surface closer to or further from the rotor's surface (and altering the shear gap therebetween). Helical slots are provided in the casing about the stator, with members extending from the stator through the slots, whereby the members can be grasped and rotated about the casing to move the stator. Channels allowing circulation of buffer fluid are provided about the stator and rotor to deter ingress of the fluid being processed into junctures between components of the colloid mill.