Some of our molders say they can't accept a surface-finish spec using the traditional Roughness Average (RA) because they can't measure it or meet it.
What does RA stand for?
RA stands for Roughness Average (Surface texture of materials)
This definition appears frequently
See other definitions of RA
We have 122 other meanings of RA in our Acronym Attic
- Rise Against (band)
- Risk Analysis
- Risk Assessment
- Roald Amundsen (1st explorer to reach the South Pole)
- Roaming Agreement
- Robot Aircraft
- Robust Nucleus of the Archistriatum
- Rocket Arena (gaming site)
- Roman Army
- Room Air
Samples in periodicals archive:
CONCLUSION The analyses of the mathematic models obtained make us possible to conclude: -The change of the roughness average in the function of cutting parameters can be represented in step function, -With the increase of cutting speed it is reduced the roughness average, -The increase of cutting depth has lower influence in the increase of Ra, -Larger influence in the roughness average has the feed and the nose radius r.
Surface finish: Using values based on Ra, roughness average.
1 2D Measurements Amplitude Parameters The roughness average or deviation of all points from a plane fit to the test part surface.
The most common measuring method is Ra or roughness average.
[FIGURE 1 OMITTED] The two-dimensional measures used in this study were range, roughness average ([R.
Out of measured data result those roughness average values an asymmetry of the roughness values because the samples created for this purpose have been cut in two directions +180[degrees] and -180[degrees].
A highly polished mirror finish of 1 to 3 roughness average (RA) gives best results.