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Ted Mooney, P.E. RET
Pine Beach, NJ

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Converting Rz measurements to Rms measurements

I'm looking for information for converting surface finish specifications measured in "Rz" to those measured in "Rms". This would be mainly on steel parts. Thanks for the help.

Kay Kucharik
- Solon, Ohio
2003

Profilometer: Mahr Pocket-Surf
profilometer3

on eBay or

Amazon

(affil links)

Rz is the same as RMS; however, the Rz spec designates a specific number of ridges and valleys (5) to be traversed by a profilometer.

AF Kenton
retired business owner - Hatboro, Pennsylvania
2003

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