This piece of equipment tests the Hardness of different materials, by using the Indention Hardness Testing method. This means that the material’s hardness is tested by applying a predetermined load (weight) amount through an indenter. The hardness of the material is measured by how big/small of an indention is left on the material after the test. Typically, the smaller the indention the harder the material, and the larger the indention the softer of material; this is because the indenter is able to move through soft materials more easily thus leaving a larger indention.
On most part drawings there is a hardness “call-out” which means the material has to be a certain hardness to function properly as a finished product. For example, car engine blocks have a certain hardness “call-out” and if the material does not meet these specifications then the engine will be scrapped. To the everyday consumer it may seem like a waste to throw away a seemingly “good” engine block, but due to the extreme pressure that is exerted on the engine block while it’s running, it is essential that the materials meet the hardness specifications.