Gear Solutions

Mechanical Paste Polishing vs. CAVF Finishing of Gears

Posted by on Monday, August 3rd, 2020 in

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

Posted by on Sunday, July 19th, 2020 in

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

Posted by on Friday, May 15th, 2020 in

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

Posted by on Sunday, April 19th, 2020 in

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)

Posted by on Monday, March 16th, 2020 in

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

Posted by on Tuesday, February 25th, 2020 in

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

Posted by on Thursday, January 16th, 2020 in

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

Posted by on Tuesday, October 1st, 2019 in

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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Selecting media for optimum vibe bowl gear finishing

Posted by on Tuesday, August 20th, 2019 in

Choosing the best media depends on structure and shape of the tooth flank, and whether media components should be abrasive, non-abrasive, or a blend....

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Materials Matter: How to Set Up a Vibratory Bowl for Gear Finishing

Posted by on Friday, July 19th, 2019 in

The vibratory bowl is toroidal-shaped, consisting of a center hub surrounded by an OD wall. Direct drive machines have a motor and driveshaft set inside the center hub....

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Measuring Tooth Flank Roughness

Posted by on Wednesday, January 23rd, 2019 in

Gear performance has continuously increased over the past two decades. Improvements in metals, heat treatments, geometry, and lubrication are just a few of the sources of these improvements....

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Materials Matter : Surface Finishing Rotorcraft Gearing

Posted by on Wednesday, October 3rd, 2018 in

Rotorcraft gearboxes are designed with the utmost precision to withstand the tremendous demand and loads required to convert thousands of horsepower and RPM into hundreds of RPM and lift torque....

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