Mitutoyo Surftest SJ-401 Surface Profilometer

Portable Surface Roughness Tester SJ-401 Surface Profilometer

The SJ-401 Surface Profilometer, shown above, provides Skidless/Skidded measurement with a measuring range in the z-direction of up to 2,400µm with an option stylus and 25mm in the x-direction at speeds of 0.05mm/s, 0.1mm/s, 0.5mm/s, or 1.0mm/s. In the laboratory, these depth profiles are done with the SJ-401 mounted on a manual column stand. The SJ-401 Surface Profilometer assesses for Primary profile (P), Roughness profile (R), and Filtered waviness profile (W), and evaluates for the following parameters: Ra, Ry, Rz, Rq, Pc, R3z, mr, Rt, Rp, Rv, Sm, S, δc, Rk, Rpk, Rvk, Mr1, Mr2, A1, A2, Lo, Ppi, R, AR, Rx, Δa, Δq, Ku, HSC, mrd, Sk, W, AW, Wte, Wx, and Vo1. A depth profile obtained with the Surface Roughness Tester SJ-401 is shown in the figure below.

Surface Roughness Tester SJ-401depth profile

Other features of the SJ-401 Surface Profilometer include:

  • The use of interchangeable nosepieces that allow skid or skidless measurements to suit the type of measurement required
  • Measurement of curved-surface roughness (skidless measurement): by removing the radius with a filter, R-surface data is processed as if taken from a flat surface
  • Auto-Calibration: The SJ-40 Series is equipped with Ra calibration and step calibration methods for detector calibration (gain adjustment). In both calibration methods only the calibrated value of the precision specimen needs to be entered. No other operations are required to calibrate the tester1




Manufacturing Engineering

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