Page 568 - Ceratizit Catalog

Surface quality
B241

Definition of measured variables for surface
quality

The surface quality of milled work pieces is influenced
through
○ the machine tool (condition, stability)
○ the milling tool (cutting edge geometry, construction)
○ the application data (v , v , f )
f c z
○ the work piece (geometry, material, clamping)

The average roughness value R is the arithmetical mean of the roughness profile within the entire measured length l .
m
a

R = 1 xl= m ││
ydx
a
l mx 0=

Average roughness value R a

Average roughness depth R is the arithmetic mean resulting from the single roughness depths Z of five successive
i
z
single measured lengths.

R Determination of the average roughness depth R from the

Milling / Technical information Maximum roughness depth R max is the largest single roughness depth Z on the measured length l . z
roughness profile

m
i
In order to produce an excellent surface finish with insert milling cutters, inserts with wiper facets
are employed.