Rmr, or material ratio at a particular depth. This parameter indicates the proportion of material removed from the top of the profile at a specific depth. The centre line or another reference height may likewise be used as a source of reference (c0).

Rdc, the height of the profile section between two material ratios. If there are outliers on the surface, Rdc(2%-98%) can be used to assess a steady roughness height value. The tallest peaks that will be eroded down and the deepest valleys that will be filled in are not included in this computation. In the automotive sector, Rdc(1%-33%) and Rdc(25%-99%) can be used to measure the material height lost during running-in and the void volume used for lubrication pockets, respectively.

Overall NextGen’s NG-SR400-T System Surface Roughness Tester can display Ra Rz, Rq Rt, Rc Rp Rv R3z R3y Rz(JIS) Ry Rs Rsk Rku Rmax Rsm Rmr RPc Rk Rpk Rvk Mr1 Mr2 Parameters.

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