Mitutoyo HR-521/522/523 hardness testing machines allow generation of multiple test force for Rockwell, Rockwell Superficial and Brinell hardness.
The interior and exterior surfaces can be reached with ease with the Dolphin-nose indenter arm. The interior has a minimum diameter of 40mm or 22mm when an optional diameter indenter, 19BAA292, is used.
The machines provide precise loading with the real-time, electronic control of test force. Any load force overshoot is completely eliminated by this.
Table retraction causes instability. This is eliminated by the indenter escape function which allows continuous testing at fixed table position.
A stable generation of test force is provided by the elevation table, which has an automatic stop feature, and automatic loading of preliminary test force.