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Do you know all the types of indenters for hardness testers?
2026-05-29
1、 Basic concepts
Indentation: The deformation caused by the indentation of the indenter (or needle) into the surface of the specimen due to the application of test force.
Indenter: a component with a specified shape that is pressed onto a hardness tester, mainly including Brinell, Rockwell, Vickers, and Knoop hardness indenters.
2、 Classified by purpose
1. Standard indenter
According to the national verification regulations, the indenter used for verifying standard hardness blocks.
2. Work pressure head
According to the national verification regulations, the indenter used to determine the hardness value of the test piece or specimen.
3、 Classified by Material
3. Hard alloy ball indenter
A spherical indenter with tungsten carbide as the main component and a certain diameter.
4. Ball pressure head
A pressure head composed of steel balls of a specified diameter and a pressure head body.
4、 Classification by type of hardness tester
5. Brinell hardness tester indenter
Steel balls or hard alloy ball indenters with diameters of 10mm, 5mm, 2.5mm, and 1mm.
6. Rockwell hardness tester cone indenter
A diamond cone indenter with a cone angle of 120 ° and a top spherical radius of 0.2mm, suitable for A, C, D, and N scales.
7. Rockwell hardness tester ball indenter
Diameter 1.588mm: suitable for B, F, G, and J scales
Diameter 3.175mm: suitable for E, H, and K scales
Diameter 6.35mm: suitable for L and M scales
Diameter 12.7mm: suitable for R scale
8. Vickers hardness tester pyramid indenter
A regular quadrangular pyramid indenter made of diamond or industrial gemstones with an angle of 136 ° between two opposing sides.
9. Knoop hardness pyramid indenter
Diamond quadrangular pyramid indenter with relative angular angles of 172 ° 30 ′ and 130 °.
10. Horizontal blade
The intersection line between two opposing sides of a pyramid indenter.
11. Shore hardness tester indenter
Symmetrical punch, diamond indenter with a top spherical radius of 1.0mm.
12. Needle pressing
The general term for the indenters of hardness testers such as Shore, Vickers, Babbitt, and International Rubber.
13. Shore A hardness tester indenter
A truncated cone with a cone angle of 35 ° and a top plane diameter of 0.79mm.
14. Shore D hardness tester indenter
A conical indenter with a cone angle of 30 ° and a top spherical radius of 0.1mm.
15. Vickers hardness tester indenter
A truncated cone with a cone angle of 60 ° and a top plane diameter of 0.4mm, suitable for aluminum and aluminum alloys;
A cylindrical indenter with a top plane diameter of 0.4mm, suitable for soft steel and hard aluminum
16. Babbitt hardness tester needle.
A truncated cone with a cone angle of 26 ° and a top plane diameter of 0.157mm.
17. Miniature rubber international hardness indenter
A steel ball indenter with a diameter of 0.395mm.
18. Punch head
In hardness testers such as Shore and Leeb, the component used to impact the specimen.
19. Leeb hardness tester punch
Also known as impact body. Except for the E-type punch made of diamond, all other forms are made of tungsten carbide. There are six models available: D, DC, D+15, G, E, and C. The G-type ball has a diameter of 5mm, while the other models have a ball head diameter of 3mm.
