So recently i found about millstones are broadly used to grind many stuff… I have looked around and i cannot find how do they actually spin. Its 2 huge rock discs on top of eachother with a grid on them that grinds the stuff like beans to make tofu… But how does it actually spins? I know there must be an axis to keep them and that they are separated my like half a milimiter. But this does not asnwer my question on whats is spinning. Lastly, how do you not get bits of stone added to the food?
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You know those houses on rivers that have the big wheels on them? The water in the river pushes that wheel around and around and in the middle of the wheel is a big stick that goes all the way inside the house. They put a huge rock that looks like a donut on that stick so it’s attached to the wheel and the water pushing on the wheel is so strong that it will spin that rock all day and night. If we put another rock below the spinning rock we can use it like a table to mash things together. We do this with grains and seeds from our garden to make flour for bread.
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