Geometrical deviations vary with their wavelengths, that is to say with the horizontal interval from one peak to another.

Surface texture measuring instrument. mocMonicat drive unit

roughness profile. profile, Rz and Rmax from unfiltered profile. Arithmetical mean deviation of the roughness Tha t< & xrtical mean of *ha tbtoiute vaHiatof thi distance y traro arithmetic*: maar. Haa to rouehnElt Srolile within the samples larrjth, Th.it ii cquiviliM. to tha height of • rectangle the length of wnich it aqua* to the r»e t,r nor set*,* lm and tha waa of which is equal to the turn of the uH: bounded by Pit roujivieii proi.it ard tha mean Una. Avarage peak-to.elley height, Rz Aihhmatk maw of the li-vU uak ta-velley her-jlm sf five Smjla petk to-v»ll»y h-eiajrtt, Zi Diitenct IWMMi...

Stainless steel surface roughness ARITHMETICAL AVERAGE ROUGHNESS Ra (MICRO INCH) Ra is generally expressed in microinches or micrometers (microns) and it the universally recognized and most used international parameter of surface finis Ra = arithmetic average deviation RELATIONSHIP BETWFFN MECHANICAL GRIT NUMBERS AMP SOMETIMES GRADE NUMBERS ARE USED TO QUALIFY A STAINLESS STEEL SURFACE FINISH STANDARD 3A GRADE FINISH = ISO - 240 GRIT FINISH

Ra — Arithmetic Average Roughness Ra, or average roughness (also designated AA or CLA), is industry's most widely used parameter. It is the arithmetic average height of roughness component irregularities from the mean line measured within the sampling length (L). Rq — Geometric Average Roughness Rq, or Root Mean Square (RMS), is more sensitive to occasional highs and lows, making it a valuable complement to Ra. Rq is the geometric average height of roughness component irregularities from the mean line measured within the sampling length (L). mean line

STftMDflFD t PARAMETERS FOR S CUT OFF LENGTH(S) RfiHQE : GOOD