Rockwell scale



noun

a measurement system used by commercial manufacturers to determine the relative hardness of objects based on the depth of indentation from a heavy object; also Rockwell hardness
Examples

Each Rockwell scale is an arbitrarily defined range of numbers from 0 to 100 covering a specific range of material hardness. Many knife manufacturers indicate the Rockwell hardness of their knife blades.
Word Origin

1919

Tagged:

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