The application discloses a coffee grinder and a coffee
machine. The coffee grinder comprises a shell with a containing cavity; a movable
grinding wheel is arranged in the containing cavity; a
grinding disc is sleeved on the movable
grinding wheel, and a grinding gap is formed between the movable
grinding wheel and the grinding disc; an outer ring is threadedly connected with the shell; a fixing
assembly is arranged between the grinding disc and the outer ring; and an axial guide
assembly is arranged in the containing cavity, and the grinding disc is connected with the axial guide
assembly. In the application, the movement track of the grinding disc is constrained by the axial guide assembly, so that the grinding disc only moves axially when the outer ring rotates, the axis before and after adjustment is kept consistent, the pressure distribution of the grinding surface is uniform, the pre-tightening force which is away from the grinding disc is provided for the outer ring by the fixing assembly, the outer ring is prevented from acting on the grinding disc due to the vibration in the
grinding process or the reaction force of the material, the stability of the grinding gap is maintained, the coffee
powder with uniform
fineness is ensured, the extraction
flavor is balanced and stable, and the use experience of consumers is improved.