The invention relates to a device for homogenizing and separating a medium (10), said device comprising a centrifuge (40, 70) with a centrifuge rotor (14, 44, 74), said centrifuge a centrifuge rotor rotatable about a motor axis (A) of a centrifuge motor (12, 42, 72) and comprising a rotor body to which at least one rotating unit (16, 48, 80) is connected, In order that said rotary unit is additionally adaptable to rotate about a rotary axis of the rotary unit different from said motor axis (A), said rotary unit can be driven by a rotary unit drive provided with a In terms of means for setting at least two different rotational speeds to said rotating unit (16, 48, 80), and furthermore said rotating unit (16, 48, 80) has teeth (8) on its peripheral portion, the Said rotary unit (16, 48, 80) can be driven via said tooth, characterized in that said rotary unit drive comprises a tooth, said tooth being associated with said centrifuge motor.