Welcome to the Surface Roughness Analysis Blog
Why do brakes squeak? When will a gasket leak? What caused the haziness in my painted finish?
Surface texture and function are tightly linked. Understanding the relationship between texture and function, and sharing that information with engineers and quality professionals, is what Michigan Metrology is all about.
The articles in this blog explore the concepts of surface texture analysis and measurement. We show how you can apply these concepts to solve problems related to leaks, squeaks, appearance, wear, noise, fit, friction, vibration, adhesion, and many other functions.
Looking for more information on specific surface texture parameters? Visit our Surface Texture Parameters Glossary for an introduction to dozens of 3D surface roughness analysis parameters.
And, if you want to learn much more about surface texture consider attending our online and in-person classes for an immersive introduction to the many concepts in surface analysis.
What can I expect from a contract measurement lab?August 15, 2022
Accurate measurement keeps processes within specifications, which is, of course, key to producing quality goods. But the equipment required to acquire accurate data can be expensive to purchase and operate.
What are the Void Volume Parameters?August 8, 2022
Fluid retention is a critical function of the surface texture in many applications. These surfaces may need to retain oil for lubrication, for example, or fluids may need to be
Scoring, scuffing, and gallingAugust 2, 2022
So many wear mechanisms…so many definitions “Wear” is the progressive modification to a surface. It may result in a loss, deposit, or redistribution of material. Quantifying different types of wear
Friction and Wear of MaterialsJuly 25, 2022
For those of you who have taken my class, you know that this is an important resource for me. Ernest Rabinowicz really pioneered our understanding of friction and wear, both
The “leaks and squeaks” imagesJuly 18, 2022
Over the years we’ve shown these images frequently on our website (which has just been updated, by the way!). Taken together, they sum up the kinds of issues we see—and
Bandpass and Notch FiltersJuly 11, 2022
It’s a regular refrain on this blog: surface texture consists of a spectrum of spatial wavelengths, ranging from shorter spatial-wavelength roughness through longer spatial-wavelength waviness and form. Through the process
Celebrating Floyd FirestoneJuly 5, 2022
Floyd Alburn Firestone was an acoustical physicist with wide-ranging talents, with important contributions in fields including acoustics, non-destructive testing, medicine, and surface texture. He is remembered as developing the first
Micro vs macro leadJune 28, 2022
Rotary lip seals create a boundary around shafts in rotary equipment, typically to retain lubricant on one side versus air or gas on the other. On first consideration, it would
Ra changes when the cutoff changesJune 21, 2022
The Roughness Average, or average roughness parameter, Ra, is the average of the surface heights of every point along the “roughness profile.” Its equivalent for areal (3D) measurements is the
The Surface Texture Answer BookJune 15, 2022
I’ve been working with surface roughness for over 30 years…yet I am always looking for ways to expand my knowledge. This book has been in heavy rotation for me since
Can stylus and optical measurements correlate?June 8, 2022
Many companies use both stylus and optical measurement technologies to measure surface texture. A question that we are often asked is, “Can the measurements between these different systems correlate, and
Why stitch surface texture data?June 1, 2022
How would you go about measuring these coins? In terms of value, the most precious would likely depend upon your age, and possibly the time left on your parking meter!