Here is an old way that can be safely attributed to the True People's Category "Gol to Fortiment Hitra."
In order to sharpen the knives of the meat grinder at home, not possessing the skills of the grinder, it will take a wooden circle to which coarse sandpaper is pasted. Better if it is on a tissue basis. The diameter of the mug must be equal to the diameter of the grid of the meat grinder.
The sharpening of the knives of the meat grinder is produced in the meat grinder. To do this, it is strengthened on the table, the auger is inserted, they put the knife on it, and instead of the lattice, it is installed prepared as described above, a wooden circle. After that, the meat grinder is not very tightly screwed down the clamping nut and begin to rotate her handle. First, the meat grinder handle rotate slowly, then slightly faster. After two or three dozen rotations of the handle, the coarse sharpening of the knives of the meat grinder can be considered completed.
If it is necessary to sharpen the knives of the meat grinder at home better, then the coarse sandpaper on a wooden circle can be replaced with emery paper with smaller grain and repeat the entire operation again.
A source