Mitutoyo SURFTEST SJ-410 - Evaluation Based on JIS B0601-2001 and ISO

No. 99MBB765A
23-4
23.1.4 Evaluation based on JIS B0601-2001 and ISO
Shown below are the standard sampling lengths and evaluation lengths for evaluation
based on JIS B0601-2001 and ISO.
■ Standard sampling lengths and evaluation lengths for the measurement of roughness parameters from
periodic profiles, and for the measurement of RSm from both periodic and non-periodic profiles
RSm Range
Sampling length (ℓ)
Evaluation length (ℓn)
0.013 < RSm ≤ 0.04 mm 0.08 mm 0.4 mm
0.04 < RSm ≤ 0.13 mm 0.25 mm 1.25 mm
0.13 < RSm ≤ 0.4 mm 0.8 mm 4 mm
0.4 < RSm ≤ 1.3 mm 2.5 mm 12.5 mm
1.3 < RSm ≤ 4.0 mm 8 mm 40 mm
■ Standard sampling lengths and evaluation lengths for the measurement of Ra and Rq from non-periodic
roughness profiles
Ra Range
Sampling length (ℓ)
Evaluation length (ℓn)
（0.006）
< Ra ≤ 0.02 µm 0.08 mm 0.4 mm
0.02 < Ra ≤ 0.1 µm 0.25 mm 1.25 mm
0.1 < Ra ≤ 2.0 µm 0.8 mm 4 mm
2.0 < Ra ≤ 10.0 µm 2.5 mm 12.5 mm
10.0 < Ra ≤ 80.0 µm 8 mm 40 mm
■ Standard sampling lengths and evaluation lengths for measurement of Rz, Rp, and Rt from non-periodic
roughness profiles
Rz range
Sampling length (ℓ)
Evaluation length (ℓn)
（0.025）
< Rz ≤ 0.10 µm 0.08 mm 0.4 mm
0.10 < Rz ≤ 0.50 µm 0.25 mm 1.25 mm
0.50 < Rz ≤ 10.0 µm 0.8 mm 4 mm
10.0 < Rz ≤ 50.0 µm 2.5 mm 12.5 mm
50.0 < Rz ≤ 200.0 µm 8 mm 40 mm