A heavy piece of metal grinds more than once, but stops in the middle before continuing.
A hard food is getting crunched constantly and loudly. A heavy piece of metal grinds more than once, but stops in the middle before continuing. A metal object grinds repeatedly, abruptly stopping every so often then resuming over time. A person operating a grinder taking momentary pauses. Momentary pauses are taken while a person operates a grinder