The accuracy and the consistency of the STE hardness tester is due to the original principle of the loading system. The applied force causes penetration of the indenter into the surface with a load determinated by the calibrated pin, which breaks at 1 580 kgF (15 000 N).
The value of Brinell hardness is obtained by reading the diameter of indentation on readout charts which assure proper correlation between load applied and impression diameter, and are provided with each bag of pins.
The ERNST calibrated pin system replaces the impact bar system giving a greater versatility and high accuracy. The indentations can be made very quickly even by an unskilled operator. The indentation can be read immediately, or at a later time by an inspector.
Due to the fact that with the calibrated pin system only one reading of the indentation on the piece is necessary, error possibilities are cut by 50% compared to the impact bar system. The comparison errors are eliminated and the resulting accuracy is comparable to the bench hardness testers.
|Minimum measurable diameter||30mm without preparation|
|Overall dimensions||L30cm x W18cm x H6cm|
|Working area dimensions||min. 20mm x 20mm|
|Reading||on ERNST reading table|
|Load application method||dynamic|
OPTIONAL: e-brio - Antares
(weight of the clamp 3,6kg - clamp capacity 150mm)
|Working principle||STE PAT Ernst|
|Standard scales||HB/30 - N/mm² - kg/mm² on reading table|