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AGIE CHARMILLES EDM Finish Scale

Measurement of surface finishes is done with instruments called profilometers.

Experience proves that measurement of surface finishes by comparison using a surface finish gauge does not give an error above 2 CH classes.

The criteria of roughness are the Ra (Europe) – CLA (UK) – AA (USA)

To obtain a grading of roughness, Charmilles has defined a CH scale, which is however cross referenced with the standards that are in common use.

John Griffiths at: 978-544-6500

or Ken Otzel at: 508-958-5565