Root arithmetical average roughness value
| Symbol | RaF |
|---|---|
| Unit | µm |
| Attribute-ID | arithmetic mean fillet roughness |
| Numeric ID | 815 |
| Value Type | PMTechValue |
The arithmetic mean of the absolute values for profile variation within the measuring area lm. [Fischer, U. et. al.: Tabellenbuch Metall; Europa-Lehrmittel, 41st edition] (in German)
| Z | z axis |
| m | Reference line |
| lm | Measurement area |
| Ra | Arithmetic mean roughness value |
Ra can be approximately converted to Rz using the following equation: Ra = Rz / 6
Rz can be approximately converted to Ra using the following equation: Rz = Ra * 6