Ceratizit - полный каталог инструмента 2016 EN
Surface quality
A277
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Average roughness value Ra DIN (4768)
This is defined as the arithmetical mean of the absolute
sums of the roughness profile R within the entire meas-
ured length lm.
Average roughness depth Rz (DIN 4768)
This is defined as the average value resulting from the
single roughness depths of five successive single meas-
ured lengths le.
Single surface roughness depth Z1 ... Z5
This is the vertical distance between the high-
est and the lowest point of the roughness profile R
within a single measured length le.
Maximum surface roughness depth Rt (DIN
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 quality according to manufacturing method
Surface symbol according to ISO
1302
Surface symbol according to ISO
3141
new 0,025 0,05 0,1 0,2 0,4 0,8 1,6 3,2 6,3 12,5 25
until now
50
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
Arithmetic mean value
Ra [µm] 0,025 0,05 0,1 0,2 0,4 0,8 1,6 3,2 6,3 12,5 25
50
Surface roughness depth
Rz [µm] 0,25 0,63
1
1,6 2,5 4-6,3 10 16-25 40
63 100 160
Longitudinal turning
Face turning
Longitudinal turning
Face turning
Longitudinal grinding
Surface grinding
Surface roughness (produced through special
methods)
Surface roughness (produced through normal
workshop methods)
Surface roughness (produced through
rough machining methods)
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