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HOME > Technology > Measurement and Symbol of Surface Roughness

 Measurement and Symbol of Surface Roughness

Type Maximum Height of the Profile Symbol Rz
Description

The maximum height of the profile is the distance between the maximum peak height and the maximum valley depth from then mean line in each sampling length. Rz(ISO/JIS) is the mean value of the maximum peak-to-valley heights in the evaluation length.


Type Arithmetic Mean Deviation of the Profile Symbol Ra
Description

The arithmetic mean deviation of the profile is the arithmetic mean of the absolute values of distances from the mean line to the profile.



Value of Maximum Height of the Profile

Value of Ten-Point Height of Irregularities

Value of Arithmeric Mean Deviation of the Profile

Finishing Symbol

0.1S
0.2S
0.3S
0.1Z
0.2Z
0.4Z
0.025a
0.05a
0.1a
0.8S 0.8Z 0.2a
1.6S
3.2S
6.3S
1.6Z
3.2Z
6.3Z
0.4a
0.8a
1.6a
12.5S
25S
12.5Z
25Z
3.2a
6.3a
50S
100S
50Z
100Z
12.5a
25a

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