wear
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....
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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 install...
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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....
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The Effect of Superfinishing on Gear Micropitting, Part I
The most common failure mechanism of highly stressed case carburized gears is micropitting (gray staining). The standard FZG gear test (FVA Work Sheet 54) is generally used to determine the micropitting load capacity of gear lubricants....
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The Capacity of Superfinished Vehicle Components to Increase Fuel Economy
The lubricant industry is emphasizing the use of low-viscosity lubricants to increase fuel economy. Fuel mileage increases as high as 8% are claimed when conventional engine and driveline lubricants are replaced with new generation products....
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Evaluation of Isotropic Superfinishing on a Bell Helicopter Model 427 Main Rotor Gearbox
The surface finish of a gear tooth is a critical factor in the wear, durability, noise generation, and efficiency of modern helicopter transmissions....
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Isotropic Finishing of Helicopter and Turboprop Gearbox Components
The traditional finishing techniques for engineered gearbox surfaces include but are not limited to hob shaving, gear grinding and honing....
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