Standard Cerchar Rock Abrasiveness Tester

The standard cerchar abrasiveness tester is used to determine the CERCHAR Abrasivity Index (CAI) value per as standard ASTM D7625-10.

Accurate stainless steel mass for axial test load of 70N in combination with special cross table which allows high resolution movement of the specimen clamping device in two directions (X, Y) to achieve tool wear and repeat traverse action.

The standard package includes of a binocular microscope and as an option with a trinocular microscopes, CCD camera and measurement software.






  • Simple manual operation
  • Stiff frame with precise movement of the clamping device, head and base plate made of solid aluminum
  • Portable cross table with clamping device for the adjustment the specimen in X and Y directions
  • Easy adjustment for different sample sizes
  • Easy and smooth loading and unloading of specimen using a special extender wheel solution


  • Binocular or trinocular microscopes
  • Test pin for Cerchar device:
    • Rockwell hardness: 40 / 42 HRC
    • Rockwell hardness: 54 / 56 HRC

Axial load

70 N 

Maximum sample height

200 mm

Maximum sample diamter

Ø 100 mm

Larger sample size on request