Grinder for grinding material to be ground, in particular for grinding coffee beans, comprising a container for receiving material to be ground with a discharge opening for the material to be ground; a first grinding tool and a second grinding tool, wherein the first grinding tool is configured to be rotated relative to the second grinding tool about an axis of rotation such that material to be ground is enabled to be crushed to a powder in a grinding gap formed between the first grinding tool and the second grinding tool, wherein the second grinding tool has an inlet channel through which material to be ground discharged from the discharge opening is enabled to be supplied into the grinding gap, and wherein the second grinding tool is mounted in such a way that it is axially movable with regard to the axis of rotation and is enabled to be brought into different positions (P1, P2) relative to the first grinding tool and to the container; a housing with an internal space delimited by the housing in which the first grinding tool and the second grinding tool are arranged, wherein the container is arranged stationarily relative to the housing; a collar seal with a through channel extending along the axis of rotation, said collar seal being arranged between the container and the second grinding tool so that material to be ground is enabled to fall from the container through the discharge opening of the container via the through channel of the collar seal into the inlet channel of the second grinding tool; wherein the second grinding tool comprises a wall section which extends annularly around the axis of rotation and outwardly radially delimits the inlet channel; wherein the collar seal comprises a first annular section which outwardly radially delimits the through channel; wherein collar seal comprises a second annular section, which extends annularly around the axis of rotation and is connected to the first annular section and a contact surface is present on which the second annular section of the collar seal is supported in order to hold the collar seal in a predetermined position relative to the container, wherein the collar seal is arranged stationarily relative to the container such that the first annular section extends axially to the axis of rotation in such a way that a first area of the first annular section is in contact with the container and a second area of the first annular section has an overlap with the wall section of the second grinding tool in the direction of the axis of rotation, and the collar seal comprises at least one connecting section which extends between the first annular section and the second annular section and is connected both to the first annular section and also the second annular section, characterised in that the at least one connecting section is designed as an elastically deformable spring element. a container for receiving material to be ground with a discharge opening for the material to be ground; a first grinding tool and a second grinding tool, wherein the first grinding tool is configured to be rotated relative to the second grinding tool about an axis of rotation such that material to be ground is enabled to be crushed to a powder in a grinding gap formed between the first grinding tool and the second grinding tool, wherein the second grinding tool has an inlet channel through which material to be ground discharged from the discharge opening is enabled to be supplied into the grinding gap, and wherein the second grinding tool is mounted in such a way that it is axially movable with regard to the axis of rotation and is enabled to be brought into different positions (P1, P2) relative to the first grinding tool and to the container; a housing with an internal space delimited by the housing in which the first grinding tool and the second grinding tool are arranged, wherein the container is arranged stationarily relative to the housing; a collar seal with a through channel extending along the axis of rotation, said collar seal being arranged between the container and the second grinding tool so that material to be ground is enabled to fall from the container through the discharge opening of the container via the through channel of the collar seal into the inlet channel of the second grinding tool; wherein the second grinding tool comprises a wall section which extends annularly around the axis of rotation and outwardly radially delimits the inlet channel; wherein the collar seal comprises a first annular section which outwardly radially delimits the through channel; wherein collar seal comprises a second annular section, which extends annularly around the axis of rotation and is connected to the first annular section and a contact surface is present on which the second annular section of the collar seal is supported in order to hold the collar seal in a predetermined position relative to the container, wherein the collar seal is arranged stationarily relative to the container such that the first annular section extends axially to the axis of rotation in such a way that a first area of the first annular section is in contact with the container and a second area of the first annular section has an overlap with the wall section of the second grinding tool in the direction of the axis of rotation, and the collar seal comprises at least one connecting section which extends between the first annular section and the second annular section and is connected both to the first annular section and also the second annular section, characterised in that the at least one connecting section is designed as an elastically deformable spring element.