#Waveburner for 6.9 micrometers manual#
#Waveburner for 6.9 micrometers free#

But for sine wave roughness the factor would be 1.11, and for many real world metal working processes the factor approximates 1.25. RMS and Ra measure two different things, so there is no actual conversion factor. We went back and added this anachronistic running commentary based on clarifications by subsequent readers: note: This thread has continuing errors so it was very hard to follow. Retired business owner - Hatboro, PennsylvaniaĮd. Ra is a average of only peaks therefore, to get an Ra, multiple your 3.2 to 6.3 by 2 to get 6.4 to 12.4 Ra. Term RMS refers to the mathematical Root Mean Square which is an average of peaks and valleys of a materials surface profile. What does the RMS means? How can we convert 3.2 - 6.3 RMS to Ra value? Please reply immediately. If you need to measure a VERY rough surface, you will need a different profilometer.Ĭlosely related historical postings, oldest first: 2001 It sounds like your profilometer is not able to measure a surface roughness greater than Ra 12.5.įirst verify what the customer really needs. If the customer calls out a default finish spec for a part, it should apply to machined surfaces, only. If the customer actually put a microfinish symbol on the cast surface, it sounds like a design error. along with text that listed other forbidden defects.

#Waveburner for 6.9 micrometers free#

Intriguingly, the products offered for sale are durable, versatile, and super accurate.Since you are trying to measure a cast surface, I assume it is NOT a bearing surface.Ĭast surfaces usually have only requirements to look good and be free of defects that would weaken the casting (cracks, sand holes, etc)įor appearance purposes, comparison samples would be sufficient.

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#Waveburner for 6.9 micrometers manual#

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