Calcolatrice Rugosità Superficiale Gratuita
Converti la rugosità superficiale da Ra a Rz.
micrometres
Ten-Point Roughness (Rz)
8.00 micrometres
Ra in micro-inches63.0 micro-in
ISO Grade (N)7
Ten-Point Roughness (Rz) vs Arithmetic Mean Roughness (Ra)
Formula
## Surface Roughness Parameters Surface roughness describes the fine irregularities on a machined surface. ### Key Parameters **Ra** (arithmetic average roughness) is the most common measure - the average deviation from the mean line. **Rz** (ten-point height) is the average difference between the 5 highest peaks and 5 deepest valleys. Rz is typically 4-7 times Ra depending on the machining process. ### ISO Roughness Grades N1 (Ra 0.025) through N12 (Ra 50), each step doubling the roughness.
Esempio Risolto
A machined surface with Ra = 1.6 micrometres.
- 01Rz = 1.6 x 5 = 8.0 micrometres
- 02Ra in micro-inches = 1.6 x 39.37 = 63 micro-in
- 03ISO grade: Ra 1.6 corresponds to N7