LIVONIA, MI Michigan Metrology, experts in solving problems related to surface roughness, wear, texture and finish, is making three tools available to aid the understanding of surface roughness measurement and the proper use of surface texture parameters.

Surface Finish/Friction/Wear Short Course

On April 29 and 30, 2015, Michigan Metrology’s Donald Cohen, PhD will be leading a two-day, surface finish, friction and wear short course in Livonia, Mich.

Cohen is one of the country’s foremost experts in surface roughness and its effects. The course’s topics will include:

  • Roughness, waviness and form
  • Instruments for measuring texture
  • Filtering surface texture measurements
  • Surface texture parameters
  • Wear
  • Friction
  • Sealing
  • Surface energy
  • Data analysis
  • Specifying surface texture

The workshop is designed for scientists, engineers and technicians working in the fields of automotive, aerospace, materials, polymers, and others. More information is available at

Those interested in the short course can register by visiting here, calling 866-953-5030 or emailing [email protected].

Filtering Short Course Module

One of the most fundamental, yet often least understood, aspects of surface texture analysis is the specification and proper use of cutoff filters to define functional surface requirements.

The one-hour filtering module from Cohen’s 2013 Short Course is now available as a free video download here. This module describes the necessity for cutoff filters, the types of filters, and proper methods for specifying and verifying functional surface texture using a combination of parameters and cutoff filters.

Texture Parameters Glossary

Cohen has developed and maintains a comprehensive glossary of surface texture parameters, including descriptions of parameters, their calculations, and illustrative examples of how they are used to describe surface texture and solve problems. The glossary is now available free here.

About Donald Cohen
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.

Prior to forming Michigan Metrology, Cohen was vice president of engineering at WYKO Corporation (now part of Bruker Corporation), developing surface metrology instrumentation. He served as vice chairman and chairman of the ANSI/ASME B46.1 Surface Texture Standards committee from 2000-2011 and is past chairman of the STLE-Detroit section. He holds both bachelor's and master's degrees in physics and a Ph.D. in optical sciences.