Q17. How is bearing material hardness measured?

There are several standard scales for measuring a material's hardness including Rockwell, Brinell, Vickers, and Shore.  For bearings, the Rockwell scale is predominantly used.  However, even within the Rockwell Hardness Test, there are several different scales used to specify the hardness of different materials.  Typically, the Rockwell "C Scale" is used for measuring the hardness of bearing materials since bearings are usually made from very hard materials.

For more details about the Rockwell Scale including coversions into the other hardness standards, please see our technical paper entitled, "Rockwell Hardness Conversions."

 

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