Rockwell Hardness Machine This Rockwell hardness machine is made in 3 types. They are 1. Rockwell Hardness Machine 2. Rockwell cum Superficial Hardness Machine 3. Rockwell cum Brinell Hardness Machine 1. Rockwell Hardness Machine :- This machine is used to determine the hardness of materials such as ferrous, non-ferrous, steel, copper, aluminum and ferrous alloys, steel alloys, copper alloys, aluminum alloys etc. It has many types of scales which are important HRA (Hardness of Rockwell A Scale)(60kg load, diamond indenter, black dial) :- This scale is used to know the hardness of materials like steel, ferrous, case hardened materials above 2mm sheets. HRB (Hardness of Rockwell B Scale)(100kg load, 1/16'' inch ball indenter, red dial) :- This scale is used to determine the hardness of materials like non-ferrous, copper, aluminum and alloys. HRC (Hardness of Rockwell C Scale)(150 kg load, diamond indenter, black dial) :- This scale is use...