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Millstones or mill stones are stones used in gristmills, for grinding wheat or other grains. They are sometimes referred to as grindstones or grinding stones.. Millstones come in pairs: a convex stationary base known as the bedstone and a concave runner stone that rotates. The movement of the runner on top of the bedstone creates a "scissoring" action that grinds grain trapped between the stones.
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The heart of a grist mill was its grinding stones. Grinding stones were used in pairs. The bottom stone, or bed stone, was fixed into position, while the upper stone, or runner stone, moved. The stones were connected to the power source (water or wind) by a wooden "counterwheel," or contrate wheel, wedged on the horizontal drive shaft, which ...
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lie level during the dressing process. While the stones are dressed the crane can be removed and pushed to the side, out of the way. The tools used for dressing or sharpening the grinding faces of the millstones are called "mill bills" or "mill picks." The mill bills are shaped like a double-ended wedge and made from cast steel that is ...
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Definition of Millstones in the Idioms Dictionary. Millstones phrase. What does Millstones expression mean? Definitions by the largest Idiom Dictionary. ... Even though grain continued for many centuries to be ground by using a pair of heavy circular stones, by the sixteenth century the term was also being used figuratively for an emotional or ...
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