What usually makes a meat grinder auger difficult to remove?

An auger usually seizes because fat and connective tissue dry hard between the flights and barrel, or because the retaining nut was over-torqued and the threads galled. A plate pressed too tightly against the auger face, a shaft end without a locating shoulder, or a corroded spline can jam it just as effectively; hardened residue from delayed cleaning is the most common trigger. During the trial, remove and refit the auger yourself, noting whether a puller is needed, the correct sequence, and the actual time from power-off to extraction. For high-throughput lines, choose a tool-free quick-release design with a locating pin, and write that measured changeover time into the acceptance terms.