The testing method utilized by the West Cerchar Abrasivity Index Tester involves a specific sequence of steps to accurately assess the abrasivity of rock samples.

1. Scrutinize the Sample: Initially, the rock sample is carefully scrutinized to identify the most appropriate scratch location and direction, especially for rocks exhibiting a high level of anisotropy. The chosen scratch location and direction should best represent the sample’s dominant mineralogy and texture.
2. Clamp and Position the Stylus: Next, the sample is firmly clamped in the vice, and the stylus is carefully lowered and positioned onto the rock surface, ensuring it is perfectly orthogonal to it.
3. Scratch Test: The standard scratch test is performed, involving a scratch length of 10.0 mm and a duration of 10 seconds. The operator ensures constant contact between the stylus and rock surface during this phase.
4. Post-Test Procedures: After the test, the stylus is carefully lifted from the rock surface and removed.
5. Measure the Wear: Lastly, measurements of the stylus tip’s wear flat are made using a microscope with a minimum magnification of 25x, with measurements conducted via side- or top-view settings.

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