Gear Solutions Archives - REM Surface Engineering

Tackling EV Noise Reduction

Posted by Danny Estrada on Tuesday, December 13th, 2022 in

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

Vibratory Bowl Media Attrition: Part 2

Posted by Danny Estrada on Monday, June 20th, 2022 in

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

Vibratory Bowl Gear Polishing Inefficiencies

Posted by Danny Estrada on Tuesday, May 31st, 2022 in

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

Mechanical Paste Polishing vs. CAVF Finishing of Gears

Posted by Danny Estrada 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....

The Challenges of Generic Deburring vs. CAVF Deburring

Posted by Danny Estrada 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. ...

Gear designers and manufacturers will need to review and update their tooth flank roughness specifications based on the new ISO 21920 GPS family of standards.

Changes Ahead in the Roughness Standards

Posted by Mark Michaud 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!...

Materials Matter : Roughness Measurement: Optical vs. Contact Stylus Profilometry

Posted by Mark Michaud 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....

Rotorcraft Gearbox Regulations: LOL (not what you think)

Posted by Mark Michaud 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....

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

Posted by Mark Michaud 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....

Roughness Measurement Tips: The Scratch Pad

Posted by Mark Michaud 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....

Vibratory Media Compositions vs. Attrition and Density

Posted by Bill Nebiolo 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. ...

Selecting media for optimum vibe bowl gear finishing

Posted by Bill Nebiolo 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....