Download Surface Roughness Tester

10
REFERENCE
INFORMATION
10.1 Surface Roughness Standard
10.1.1 Evaluation according to JIS B0601-1982
■ Standard cutoff length and evaluation length for Ra (Use the 2RC75 filter.)
Range of Ra
(μm)
Ra ≤
12.5
< Ra ≤
12.5
100
Cutoff length (λc)
(mm)
Evaluation length (ᐉn)
(mm)
0.8
2.4 or greater
2.5
7.5 or greater
■ Standard sampling length for Ry
Sampling length (ᐉ)
(mm)
Range of Ry
(μm)
Ry ≤
0.8
0.25
0.8
< Ry ≤
6.3
< Ry ≤
25
25
< Ry ≤
100
8
100
< Ry ≤
400
25
6.3
0.8
2.5
■ Standard sampling length for Rz
Sampling length (ᐉ)
(mm)
Range of Rz
(μm)
Rz ≤
No. 99MBB079A
0.8
< Rz ≤
6.3
< Rz ≤
0.8
6.3
25
0.25
0.8
2.5
25
< Rz ≤
100
8
100
< Rz ≤
400
25
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