Grinding Stone - album - was created in 1973-05.

they are gears to grinding stone , grinding stone bucket to pour grain

In 1880, the cost of a grinding stone would have varied depending on the size, material, and quality. However, generally speaking, a basic grinding stone would have cost around a few dollars at that time.

Use a grinding stone to get an even edge then sharpen with an oil stone

Turning uses a knife edge to shear a piece off

grinding uses a stone to abrade and break off a pieces the width of the stone

turning point or line contact

grinding area contact