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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 : Roughness Measurement: Optical vs. Contact Stylus Profilometry

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.

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Roughness Measurement Tips: The Scratch Pad

From the perspective of the shop floor environment, the previous Materials Matter column “Roughness Measurement Tips: 2 V 5” discussed the contact stylus 2-micron radius tip versus a 5-micron radius tip.

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Vibratory Media Compositions vs. Attrition and Density

The third in our multi-part series on vibratory processing of gears is focused on understanding how media of different compositions have varying attrition rates and densities, and why these are important in vibratory finishing of gears.

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