IN NATURE of Jan. 23, 1926 (vol. 117, p. 117), I gave a description of a method of determining Hardness, in which a cone of the material to be tested was pressed against a hard surface (sapphire ...

4 seconds! That is how fast you can perform a test with the Versitron Rockwell hardness tester. Unlike most hardness testers, the Versitron applies both the pre-load and full load through the test ...

Rockwell Method : This hardness tester can be used in variety of applications and is readily adjustable to a wide range of sizes and shapes which are difficult to test in a standard table model ...