Call toll free,

Surface Roughness and Tribology Classes, Live and Online

Are you interested in learning about surface texture, wear, friction, sealing, surface energy, paint appearance, and more?

Dr. Don Cohen, one of the country's foremost experts in surface roughness, is now offering Surface Texture and Tribology short courses, both live in-person and as online learning modules at These courses cover a broad range of topics on surface texture and how it impacts functionality.

Dr. Cohen's courses are designed for scientists, engineers and technicians working in the fields of automotive, aerospace, materials, polymers, and others. No prior study is required.

Please email to receive information on future classes, or learn about our online class options below.

"This was one of the best classes I have ever taken. It really helped me understand surface texture and simply it made me a better inspector. It helped me see the bigger picture. I guarantee you’re going to want to learn more."

Agustin Guzmán, Inspector at SpaceX

View a video introduction to the course

Live Classes

Dr. Cohen presents the Surface Texture and Tribology class several times per year, either in-person or live online in a professional learning environment. If you are a learner who benefits from interacting live with the instructor this is a great opportunity to be able to ask Dr. Cohen questions in real-time.

Please email to receive information on upcoming classes.

The class material covers the following topics:

• Intro to surface texture …why is it important?

• Instruments for surface roughness measurement (stylus, optical, AFM…)

• Filtering of surface texture measurements (2RC, Gaussian…)

• Parameters for surface texture analysis (Sa, Spk, Ssc, etc.)

• Wear (scoring, scuffing, galling, wear volume, wear depth…)

• Friction (how does surface texture relate to friction?)

• Sealing (gaskets, O-rings, lip seals, piston rings…)

• Surface energy/surface texture

• Correlation between non-contact and contacting systems

• Data analysis (T-Test, F-Test, principle components, regression…)

• Specifying surface texture (symbology)

• “Surface Metrology Strategy” (project approach).

All presentation material are provided following the class. Depending on the time and interest, certain presentation modules may be eliminated or substituted.


Online Class Modules on uDemy

If you prefer an online learning environment, we invite you to check out our class modules at The class is divided into the following modules so you can tailor your learning to your needs:

1. Surface Finish: Introduction, Instruments & Correlation - Why surface texture matters; the types of instruments for measuring surface texture; techniques for ensuring measurement correlation. This module is available for free as an introduction to the class and to surface texture in general.

2. Filtering for Roughness, Waviness & Form - The process of separating surface texture into short-wavelength roughness,and higher-wavelength waviness and form. Much of the following course material builds on this module, so we recommend it as a starting point.

3. Surface Roughness Parameters - Introduction to common surface texture parameters; amplitude, spatial, hybrid and functional parameters; parameter definitions and meanings; strengths and shortcomings of each parameter for describing various part functionalities.

4. Wear Mechanisms, Measurement and Specification - Wear mechanisms and how they progressively modify a surface and alter its functionality; surface texture parameters for quantifying wear; the relationships between wear and material properties.

5. Dry Friction (Sliding Friction) - The physics of dry, sliding friction; methods for quantifying friction; the relationship between surface texture and friction; the concept of "real contact"; surface texture parameters that relate to, and change with, dry friction.

6. Lubricated Friction - The mechanisms of lubricated friction and how it is quantified; relationships between surface texture and lubricated friction; the hydrodynamic, elastohydrodynamic, mixed and boundary regimes and how friction differs in each.

7. Rolling Friction - The mechanisms of dry, rolling friction;definitions and difference between tractive rolling, tractive friction and rolling friction; the relationship between surface texture, lubrication, and rolling friction.

8. Surface Energy, Wetting & Surface Roughness - The dynamics of surface energy and wetting; surface texture, surface tension, and hysteresis; hydrophilic and hydrophobic surfaces; surface modifications to achieve a desired wettability.

9. Seals, Sealing, & Surface Finish - Types of sealing systems and materials, impact of surface roughness and waviness; surface texture parameters for sealing applications; morphological filters (aka "virtual gaskets"); the Bearing Ratio (or Material Ratio) curve and its application to seals.

10. Coatings: Surface Roughness from Substrate to Topcoat - How surface texture at each level of a coating system affects final appearance; instruments for measuring paint appearance; specifications for controlling spatial wavelength bands on substrates and coating layers.

Each course module costs less than $30, making this an incredibly cost-effective learning opportunity.

View all of the modules on


Customized Classes for your Company

The course is also available as an online class tailored to your company's specific needs and interest, which can be presented through your internal systems.

Email us at, or call 866-953-5030 to get information on the next live short course, or to get a quote for a custom class.

About the Instructor

In 1994, Dr. Cohen established Michigan Metrology to help engineers and scientists solve problems related to “Squeaks, leaks, friction, wear, appearance, adhesion and other issues”, using 3D Surface MicroTexture Measurement and Analysis.

Dr. Cohen is a past Chairman of the STLE-Detroit section and has been active with the ASME B46.1 committee on surface texture since 1988, having served as Chair from 2005-2011. Dr. Cohen is also a Subject Matter Expert for the ISO surface metrology activities.

Dr. Cohen has an undergraduate degree in Physics from the University of Michigan, Dearborn, and graduate degrees in Physics and Optical Sciences from the University of Arizona. Early in his career, Dr. Cohen worked with IBM on optical disk drive development. He later joined WYKO Corporation as Product Manger and later became Vice President, leading the development of 3D surface texture metrology instrumentation.

Dr. Cohen has developed this class over the past 20 years having presented the material at numerous client locations as part of his training and consulting activities. Typically once a year the class is offered to a general audience in the Livonia, MI area.

Email us at, or call 866-953-5030 for more information on our classes.

Register for the LIVE Surface Texture & Tribology Short Course
May 4-6, 2022, in Livonia, Michigan (

Call toll free, (866) 953-5030.