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Surface roughness tester sample length recommendation form.
Jan 30, 2018

Surface roughness tester sampling length is used to distinguish the characteristic of the surface roughness is a baseline length, assessment is to evaluate the roughness length profile must be a length, it can include one or a few sampling length.


Ra   (µm)

Rz   (µm)

sampling length λc(mm)

510

2040

2.5

2.55

1020

1.252.5

6.310

0.8

0.631.25

3.26.3

0.320.63

1.63.2

0.250.32

1.251.6

0.25

0.200.25
  0.160.20

1.01.25
  0.81.0

0.1250.16
  0.10.125
  0.080.1

0.630.8
  0.50.63
  0.40.5

0.0630.08
  0.050.063
  0.040.05

0.320.4
  0.250.32
  0.20.25

0.0320.04
  0.0250.032
  0.020.025

0.160.2
  0.1250.16
  0.10.125


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