Depends on the type and age of the grinder. Some very much older type supermarket grinders dont have proper grinding plates and will not grind anything useful for todays market. They had plates that kind of look like scarifiers and just break up the beans.
Some brand "medium" aged supermarket grinders have grinding plates that also are fairly crappy and when needing replacement can not be replaced with original type. Meaning you buy a kind of "upgrade" kit that allows the fitment of more modern profile grinding plates. Some grinders have already had the upgrade, others havent. You would never know without deliving into the thing.
Your grinder is *most probably* but not necessarily a Climax and my comments refer to them. Suggest you go straight to the source for further information (search Climax Coffee)
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