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 used to know the hardness of materials like ferrous, steel, carbide metals, high hardened metals.

2. Rockwell cum Superficial Hardness Machine : - This machine also works like Rockwell Hardness Machine and this machine has all the scales in Rockwell Hardness Machine but also has 6 types of scales like N Scales (15N,30N,45N), T Scales (15T,30T,45T).

• N Scales :- These scales are used to determine the hardness of thin sheets of hard materials like ferrous, steel, nickel.
• T Scales :- These scales are used to know the hardness of materials and sheets like non-ferrous, copper, aluminum, alloys, mild steel.

3. Rockwell cum Brinell Hardness Machine :- This machine also works like Rockwell Hardness Machine and this machine has all the scales present in Rockwell Hardness Machine but it also has 2 types of Brinell Scales. They are

• 2.5/187.5 scale (2.5mm ball indenter, 187.5kg load) :- These scales are used to know the hardness of hard materials like ferrous, steel, nickel. There is no direct hardness value in this scale. But a circle type impression is obtained through which the hardness value should be known using a microscope.
• 5/250 scale (5MM ball indenter, 250kg load) :- These scales are used to find out the hardness of soft materials like non-ferrous, mild steel, copper, aluminum, alloys. There is no direct hardness value in this scale. But a circle type impression is obtained through which the hardness value should be known using a microscope.