Page 958 - Ceratizit Catalog

Surface quality
E31
Surface roughness

Average roughness value R DIN (4768)
a

This is defined as the arithmetical mean of the absolute sums
of the roughness profile R within the entire measured length l .
m
Average roughness depth R (DIN 4768)
z
This is defined as the average value resulting from the sin-
gle roughness depths of five successive single measured
lengths l .
e

Single surface roughness depth Z ... Z
1 5
This is the vertical distance between the high-
est and the lowest point of the roughness profile R
within a single measured length l .
e

Maximum surface roughness depth R (DIN
t
4768/1)

This is the distance between the elevation and
depression of the line within the measured length
(reference distance) of profile filtered according to DIN 4768
sheet 1.

Surface symbol according to ISO new 0,025 0,05 0,1 0,2 0,4 0,8 1,6 3,2 6,3 12,5 25 50
1302
Surface symbol according to ISO
until now
3141
Roughness index N 1 N 2 N 3 N 4 N 5 N 6 N 7 N 8 N 9 N 10 N 11 N 12
R a [µm]
Arithmetic mean value 0,025 0,05 0,1 0,2 0,4 0,8 1,6 3,2 6,3 12,5 25 50
R z [µm]
Surface roughness depth 0,25 0,63 1 1,6 2,5 4-6,3 10 16-25 40 63 100 160
Longitudinal turning
Face turning
Multi-function tools / EcoCut Longitudinal grinding Surface roughness (produced through normal Surface roughness (produced through
Longitudinal turning
Face turning
Surface grinding
Surface roughness (produced through special
methods)
rough machining methods)
workshop methods)