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Thread: Physical height calculation of RA surface finishes.

  1. #1
    Associate Engineer
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    Sep 2017
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    Physical height calculation of RA surface finishes.

    Ra or RMS surface finishes are computed by the profilometer as root mean square results.
    Does anyone know a source for the physical height of the " peak to valley " that is being represented as Ra?
    I am sure there is a math formula for this but my search has not discovered it. Just the formulae would be good, but a calculator would be awsome :-)... TIA

  2. #2
    Administrator Kelly Bramble's Avatar
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    Tell me and I forget. Teach me and I remember. Involve me and I learn.

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