Mitutoyo SJ-210 - Rk (JIS2001, ISO1997, VDA, Free): Enabled-Material-Ratio Roughness (Center Height)

No. 99MBB122A
18-34
18.5.26 Rk (JIS2001, ISO1997, VDA, Free): Enabled-material-ratio roughness (center
height)
From the lines that are obtained by selecting 2 points (point A and point B) on the BAC
(material-ratio profile) that differ in mr value by 40%, obtain the line with the smallest
inclination. Set point C and point D to be the points where the obtained line intersects the
lines at mr = 0 and mr = 100. Rk is the difference along the vertical axis (slice level)
between point C and point D.
Rk
D
G
H
C
A
B
E
A2
A1
Rk
Rvk
Mr1 Mr2
40%
J
F
Rpk
I
Rvk
DEPTH (

m)
mr[c] (%)