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Two inline skate wheels with different durometer – 85A and 83A Digital Shore hardness tester. The Shore durometer is a device for measuring the hardness of a material, typically of polymers. [1] Higher numbers on the scale indicate a greater resistance to indentation and thus harder materials. Lower numbers indicate less resistance and softer ...
A Rockwell hardness tester. The Rockwell scale is a hardness scale based on indentation hardness of a material. The Rockwell test measures the depth of penetration of an indenter under a large load (major load) compared to the penetration made by a preload (minor load). [1]
Albert Ferdinand Shore (September 4, 1876 – January 17, 1936) was an American metallurgist and the inventor of the Shore durometer. He won the Elliott Cresson Medal. [1] Shore was born in New York City. He invented the first quadrant durometer in 1915 to measure the hardness of polymers and other elastomers. [2]
Barcol hardness is measured on a scale from 0 to 100 with the typical range being between 50B and 90B. A measurement of 60B is roughly equivalent to a Shore hardness of 80D or a Rockwell hardness M100. [4] [6] As defined in ASTM D 2583 the scale divisions from 0-100 should each indicate a depth of 0.0076 mm or the equivalent 0.0003 inches. [7]
A common use of Janka hardness ratings is to determine whether a species is suitable for use as flooring. For hardwood flooring, the test usually requires an 80 mm × 150 mm (3 in × 6 in) sample with a thickness of at least 6–8 mm, and the most commonly used test is the ASTM D1037.
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The term is also used to describe a material's rating on the scale, as in an object having a “‘Shore durometer’ of 90.” When I studied polymer science and technology in 1987, the durometer was the machine which Mr Shore used to devise his set of scales. Certainly in UK and European usage you would say something like