Here are some signs that your Brinell Hardness Tester needs maintenance: Indenter Ball Flattening or deformation: There should be perfect sphericism in the indenter ball. It needs to be replaced if it seems flat or distorted in any way. Cracks or other damage: There should be no cracks or other damage on the indenter ball. It must be replaced if there is any damage. Inconsistent indentations:...