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Tackling EV Noise Reduction

Ultimately, the next largest contributor will become the target as the transmission error is further minimized. This is typically vibro-acoustic […]

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Additive Manufacturing and Gears

Binder jetting The 3DPC started the tour with binder jetting/binder jet-like companies 3DEO and Desktop Metal. Both companies were a […]

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Vibratory Bowl Media Attrition: Part 2

What is the Attrition Rate of the Media You are Using? The key tidbit of information relative to predicting how […]

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Vibratory Bowl Gear Polishing Inefficiencies

Media Volume Inefficiency The most common inefficiency in isotropic finishing is a low media level. Media is a wear item […]

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The History of Electroplating and a Historical Review of the Evolution of NASF

The history of electroplating is a curious mixture of mistakes, observations, serendipity and experimental development, enmeshed and entwined with the discovery of electricity in the late 18th century.

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Mechanical Paste Polishing vs. CAVF Finishing of Gears

A recent Materials Matter article compared generic deburring versus CAVF (chemically accelerated vibratory finishing.) Both techniques are conducted in a vibratory unit.

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The Challenges of Generic Deburring vs. CAVF Deburring

Relative to gear hobbing, shaving, and/or post heat-treat grinding to generate accurate tooth morphology there may come a time wherein vibratory deburring is a requirement to remove adherent burrs. 

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Changes Ahead in the Roughness Standards

I have written numerous articles on tooth flank surface roughness measurement. This is such a page-turner of a subject!

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Materials Matter (DE)

Optical profilometry will become an important tool for predicting gear performance with more research and development of an objective lens to fit into tooth spaces.

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Rotorcraft Gearbox Regulations: LOL (not what you think)

The European Union’s CS-29 Amendment 7 places more stringent and rigorous testing requirements for certification of Category A type pressurized gearboxes under loss of lubrication conditions compared to the previous regulation.

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Materials Matter : Roughness Measurement Tips: Calibration, the Razor Blade Test

If a problem is found with a contact stylus profilometer during routine check with a Rubert-Song specimen, do a little troubleshooting before sending it off for calibration and recertification.