How to judge the hardness of bearing super essential oil stone

How to Judge the Hardness of Bearing Super Essential Oil Stone


Bearing super essential oil stones are widely used in various industries due to their exceptional hardness. The hardness of these stones is a crucial factor in determining their quality and performance. In this article, we will discuss the methods and techniques for judging the hardness of bearing super essential oil stones.

1. Rockwell Hardness Test:

The Rockwell hardness test is one of the most commonly used methods to determine the hardness of materials. It involves indenting the surface of the stone with a diamond cone or a tungsten carbide ball and measuring the depth of penetration. The deeper the penetration, the softer the stone, and vice versa. The test result is expressed as a hardness number on the Rockwell scale (e.g., HRC).

To perform the Rockwell hardness test, a specific load is applied to the stone surface for a predetermined period, and then the depth of penetration is measured using a special gauge. The measured depth is converted into the corresponding hardness value using a conversion chart. The higher the hardness value, the more resistant the stone is to indentation and wear.

2. Mohs Hardness Scale:

The Mohs hardness scale is another method used to evaluate the hardness of minerals and stones. It was developed by Friedrich Mohs in 1812 and consists of ten minerals arranged in order of increasing hardness. Each mineral can scratch the minerals below it on the scale but is susceptible to scratching by those above it.

To determine the hardness of a bearing super essential oil stone using the Mohs scale, various minerals with known hardness values are used as reference points. For example, if the stone can be scratched by a material with a hardness of 7 but not by a material with a hardness of 8, its hardness is considered to be between 7 and 8 on the Mohs scale.

3. Vickers Hardness Test:

The Vickers hardness test is an alternative method for measuring the hardness of materials. It involves applying a specific load to the stone surface using a diamond pyramid indenter and measuring the size of the resulting indentation. The hardness value is calculated based on the area of the indentation.

The Vickers hardness test provides a more accurate measurement of hardness compared to the Rockwell test, especially for materials with extremely high or low hardness values. It is commonly used in research laboratories and quality control departments to assess the hardness of bearing super essential oil stones.


The hardness of bearing super essential oil stones is a critical factor in determining their suitability for various applications. The Rockwell hardness test, Mohs hardness scale, and Vickers hardness test are commonly used methods for evaluating the hardness of these stones. By employing these techniques, manufacturers, suppliers, and users can ensure that the stones they are working with are of the desired hardness and will perform optimally in their respective applications.

How to judge the hardness of bearing super essential oil stone