3D Surface Roughness and Wear Measurement, Analysis and Inspection
Wear - Material Property Relationship,Adhesive Wear,Metalurgical Compatibility,sliding friction, ernest rabinowicz, friction and wear

Why are “incompatible” surfaces better for sliding friction?

September 19, 2022

Key concepts in tribology have often been discovered by trial and error…then made more broadly useful through rigorous work that uncovers the broader understanding. Such is the case of material

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Donald Cohen of Michigan Metrology is an expert in surface roughness, surface texture, 3D surface roughness measurement and tribology

A little tribology every morning

September 13, 2022

Years ago, I’d just completed one of my first major surface roughness measurement projects, and I was considering my next steps to form an actual business. I thought that I

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Rpc, or Stylus (X,Y) Pc surface roughness parameter measures the number of peaks per unit length of surface texture.

Parameters Primer: Rpc, or Stylus (X,Y) Pc

September 6, 2022

Rpc is the Peak Density in the X or Y direction of surface texture data. It is a measure of the number of peaks per unit length (i.e., peaks/mm) in

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Scaling vs autoscaling (auto-scaling) in 3d surface roughness measurement data - Michigan Metrology

Scaling and Auto-Scaling

August 29, 2022

The vertical scale of most surface roughness data is highly exaggerated so that the detail can be more readily discerned. In reality, the actual slopes are fairly gradual. At 1:1

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Osborne Reynolds

The work of Osborne Reynolds

August 22, 2022

Osborne Reynolds, born August 23, 1842 Many engineers will recognize Osborne Reynolds as a pioneer in the studies of fluid mechanics and air flow. But Reynolds was also a key

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surface roughness measurement, contract measurement lab, michigan metrology

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.

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Void Volume parameters, surface texture parameters

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

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Wear mechanisms, scoring, scuffing, galling - Michigan Metrology

Scoring, scuffing, and galling

August 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[1]. Quantifying different types of wear

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Friction and Wear of Materials, Ernest Rabinowicz, surface roughness and friction - Michigan Metrology

Friction and Wear of Materials

July 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

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Leaks, squeaks, fit, friction, noise, vibration, appearance, wear, adhesion - Michigan Metrology

The “leaks and squeaks” images

July 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

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