A succinct characterization of abrasive tools using continuous time series is developed. It is based on three parameters: natural frequency ωn, damping factor ζ, and variance γ0. These parameters can be readily interpreted in terms of the visual records. The interpretation, along with the effects of the physical constituents on the parameters, is discussed and illustrated for profiles of 8 grinding wheels, with different grit size, hardness, and structure.

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