Sclerograph rebound hardness tester

for hardness testing of steel in a hardness range from 200 - 850 HVR

During the testing process, the sclerograph is placed perpendicularly onto the fine-finished test surface of the sample and the impact rod is raised at the knurled head until the detent engages. In this way a constant drop height is always guaranteed. Simply touching the release lever disengages the detent. The impact rod drops onto the surface of the sample and rebounds to a certain height, depending on the hardness of the sample.

At the reversing point, the impact rod is held by a special arrester, this significantly simplifying the reading of the rebound height on the upper collar of the drop hammer. In order to minimise scatter in the measurements with the tester, several measurements should be performed on a sample and the mean value formed from their results. Ensure that the tester is moved slightly before each measurement in order to rule out errors that could be caused by the solidification of the material. The mean values obtained in this way are then converted into Vickers hardness values using the reference curves supplied.

Intended purpose

The tester is used for quick, mobile hardness testing of steel in a hardness range of approx. 200 to 850 HVR. It is characterised in particular by its sturdy and compact design, making it ideally suitable as a pocket tester.

Technical data

  • Measuring range: 200 - 850 HVR
  • Measuring uncertainty: +/- 5% of the respective measured value (HVR)
  • Application: Hardness testing of steel and other metals.
  • Tester calibrated on steel with an E modulus of 2.1 x 10kp/cm2.
  • Dimensions: Length x diameter 175 x 22 mm
  • Weight: net 0,18 kg, gross 0,30 kg