ISF Archives - REM Surface Engineering

Advancing rocket propulsion through Additive Manufacturing, novel surface finishing technologies and public-private partnerships

Posted by Christina Michaud on Tuesday, December 1st, 2020 in

Whilst Additive Manufacturing is undoubtedly having a huge impact on the design and manufacture of rocket propulsion systems, most notably combustion chambers and nozzles, the Achilles’ heel of all AM process is currently as-built surface finish....

Metal Finishing for 3D Printed Parts Webinar – Part 7 – OPEN IMPELLER

Posted by Danny Estrada on Monday, July 6th, 2020 in

Metal Finishing for 3D Printed Parts While many can be put into operation as sintered, there are a number of […]...

Metal Finishing for 3D Parts Webinar – Part 2

Posted by Danny Estrada on Monday, July 6th, 2020 in

What options are available? While many can be put into operation as sintered, there are a number of reasons – […]...

Metal Finishing for 3D Printed Parts Webinar – Part 1

Posted by Danny Estrada on Monday, July 6th, 2020 in

Metal Finishing for 3D Printed Parts While many can be put into operation as sintered, there are a number of […]...

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!...

Report of the Condition of a General Electric Transportation Systems Gearbox

Posted by Mark Michaud on Tuesday, April 14th, 2020 in

Wind power plant operation and maintenance (O&M) costs remain an appreciable contributor to the overall cost of wind energy, with a capacity-weighted average of $11/megawatt-hour (MWh) for projects installed since 2000 and $9/MWh for projects install...

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....

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....

A Comparison of Surface Roughness Measurement Methods for Gear Tooth Working Surfaces

Posted by Mark Michaud on Friday, October 25th, 2019 in

Surface roughness is a critical parameter for gears operating under a variety of conditions. It directly influences friction and contact temperature, and therefore has an impact on various failure modes such as macropitting, micropitting and scuffing...

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....

How-to-set-up-a-vibratory-bowl-for-gear-finishing-07-19-MM

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

Posted by Bill Nebiolo 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....