reference: R039:2006 2.4

ID: 00382

device or assembly of devices used for determining the Rockwell hardness of primarily metallic materials by performing a Rockwell indentation hardness test. Rockwell hardness machines are grouped into two classes: - Rockwell standardizing machine: Rockwell hardness machine used primarily for the standardization of Rockwell hardness indenters and for the standardization of Rockwell hardness reference test blocks. The Rockwell standardizing machine may also be used for general testing purposes. The Rockwell standardizing machine differs from a Rockwell testing machine by having smaller maximum permissible errors on certain parameters, which are defined in section 4 of this Recommendation. Standardizing machines may also be referred to as calibration machines. - Rockwell testing machine: Rockwell hardness machine used for general testing purposes