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Articles

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

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.

Advancing-rocket-propulsion-through-Additive-Manufacturing

Technical Papers

Gear Repair for Helicopters and Wind Turbines via Isotropic Superfinishing

The wind turbine, aerospace, and helicopter gear industries recognize the importance of surface finish and surface texture for maximizing component and system performance.

Gear Repair for Helicopters and Wind Turbines via Isotropic Superfinishing

Videos

Metal Finishing for 3D Printed Parts Webinar – Part 1

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

White Papers

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!

Videos

Metal Finishing for 3D Printed Parts Webinar – Part 6 – SHOCK ABSORBER PISTON

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

White Papers

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.

Technical Papers

Report of the Condition of a General Electric Transportation Systems Gearbox

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 installed since 2010

White Papers

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.

White Papers

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.

White Papers

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.

Technical Papers

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

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.

White Papers

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.

White Papers

Selecting media for optimum vibe bowl gear finishing

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.

White Papers

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

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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