roughness measurement Archives - Page 2 of 2

AH-64 Loss of Lubrication Study: Test of Isotropic Superfinished AH-64 (Apache) Engine Nose Gearbox Without Black Oxide Coating

Posted by Danny Estrada on Wednesday, September 19th, 2018 in

Rotorcraft gearboxes are designed to 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....

Materials Matter : The State of the Art of Wind Turbine Gearboxes

Posted by Mark Michaud on Wednesday, September 5th, 2018 in

Much has been written here about the global growth in the wind turbine industry. Today, more than 341,320 wind turbines are operating worldwide. In particular, the number of offshore installations has exploded in the past seven years....

Gear Expo Live! Ask the Expert with Mark Michaud

Posted by Mark Michaud on Friday, February 23rd, 2018 in

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Micropitting of the sun pinion teeth in 2018

Repairing Wind Turbine Gears and Assemblies with Isotropic Superfinishing

Posted by Danny Estrada on Tuesday, June 13th, 2017 in

As the wind turbine industry matures, the importance of operations and management (O&M) costs grows. In the early years of large kilowatt and small megawatt class wind turbines, pre-mature gearbox failure due to gear fatigue was very common and was a...

Future Advanced Rotorcraft Drive System (FARDS) Full Scale Gearbox Demonstration

Posted by Danny Estrada on Tuesday, June 6th, 2017 in

The Future Advanced Rotorcraft Drive System (FARDS) program focused on improving the performance and affordability of current aircraft drive systems....

Gear Repair for Helicopters and Wind Turbines via Isotropic Superfinishing

Posted by Justin Michaud on Tuesday, June 6th, 2017 in

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

Materials Matter: Comparing Surface Roughness Parameters

Posted by Danny Estrada on Thursday, January 5th, 2017 in

Effective gear design must account for a range of potential failure modes. As discussed in previous Materials Matter columns, gear failure modes can be fatigue-based and progressive (such as micropitting) or sudden (such as scuffing)....

Materials Matter: Lambda Ratio

Posted by Justin Michaud on Friday, October 21st, 2016 in

The lambda ratio was originally developed to quantify the quality of lubricant operating regimes relative to bearing performance....

Materials Matter: Roughness Measurement of Precision Gear Teeth

Posted by Mark Michaud on Wednesday, March 16th, 2016 in

Over the past 25 years, industries such as power generation, aerospace, automotive, and others have continuously increased the operational demands of gearboxes....