Rvm (ASME) – Average Valley Depth per ASME

Rvm is the average valley depth of the roughness profile, as defined in ASME standards. It reports the valley or dale depth excluding noise, dirt, odd scratches, etc., that aren’t part of the surface we care about. The same calculation can be performed on the waviness profile (Wvm) or primary profile (Pvm). Rp, Wp, Pp, … Read more

Rv (ISO), Wv (ISO), Pv (ISO) – Average Valley / Dale Depth per ISO

Rv is the average valley depth of the roughness profile, as defined in ISO standards. It reports the valley or dale depth excluding noise, dirt, odd scratches, etc., that aren’t part of the surface we care about. The same calculation can be performed on the waviness profile (Wv) or primary profile (Pv). Rp, Wp, Pp, … Read more

Rpm (ASME) – Average Peak Height per ASME

Rpm is the average peak height of the roughness profile, as defined in ASME standards. It reports the valley or dale depth excluding noise, dirt, odd scratches, etc., that aren’t part of the surface we care about. The same calculation can be performed on the waviness profile (Wpm) or primary profile (Ppm). Rp, Wp, Pp, … Read more

Rp (ISO), Wp (ISO), Pp (ISO) – Average Peak Height per ISO

Rp is the average peak height of the roughness profile, as defined in ISO standards. It reports the valley or dale depth excluding noise, dirt, odd scratches, etc., that aren’t part of the surface we care about. The same calculation can be performed on the waviness profile (Wp) and the primary profile (Pp). Rp, Wp, … Read more

Rz, Wz, Pz – Average Peak to Valley Height

The Rz surface texture parameter measures the average peak to valley height of the roughness profile. Rz describes the overall surface roughness while excluding extreme points that may be caused by dirt, extreme porosity, etc. The same calculation can be performed on the waviness profile (Wz) and primary profile (Pz). View more surface texture parameters … Read more

Rzx, Wzx, Pzx – Maximum Height in Section

The Rzx surface texture parameter is the maximum height of the roughness profile in a section. Rzx helps locate locally bad areas in surface roughness. The same calculation can be performed on the waviness profile (Wzx) or primary profile (Pzx). View more surface texture parameters in our Texture Parameter Video library.  

Rt, Wt, Pt – Total Height

The Rt surface roughness parameter is the Total Height of the roughness profile. It is the height of the highest peak relative to the deepest valley. The calculation can also be performed on the waviness profile (Wt) and the primary profile (Pt). Learn more about surface texture parameters in our Texture Parameter Video library.

Rsk, Wsk, Psk – Skewness

The Rsk surface roughness parameter describes the distribution of heights in the surface roughness, showing whether the distribution is relatively random or if it skews toward a great amount or peak or valley material. The same calculation can be performed on the waviness profile (Wsk) or primary profile (Psk). View more surface texture parameters in … Read more

Rq, Wq, Pq – Root Mean Square Height

The Rq surface texture parameter is the root mean square of surface roughness. Rq is like calculating a standard deviation. If the surface has a relatively bell shaped distribution of heights with few outlying peaks and valleys, Rq can describe how a surface may scatter light, hold lubrication, etc. Rq is calculated from the roughness … Read more

Rku, Wku, Pku – Kurtosis

The Rku surface roughness parameter, kurtosis, is a measure of unexpected things in surface rtexture ndata. It tells us something about the extremes, and perhaps unexpected, peaks or valleys in the roughness profile. The same calculation can be performed on the waviness profile (Wku) or primary profile (Pku). View more surface texture parameters in our … Read more

Rdr, Wdr, Pdr – Developed Length Ratio

The Rdr parameter, Developed Length Ratio, is a measure of the distance of the path you’d “walk along” the roughness profile vs the measured distance in x. The same calculation can be applied to the waviness profile (Wdr) or primary profile (Pdr). View more surface texture parameters in our Texture Parameter Video library.

Rdl, Wdl, Pdl – Developed Length

The Rdl surface texture parameter is the Developed Length of the roughness profile. Thie Rdl parameter looks at the length we’d travel along surface texture as if we were walking along a shoreline. The same calculation can be performed on the waviness profile (Wdl) or primary profile (Pdl). View more surface texture parameters in our … Read more