Technical Papers

Technical Papers

Superfinishing and its Effect on Micropitting

Micropitting is a prominent failure mechanism for both highly stressed case carburized gears and bearings that operate consistently in low speed, low load environments where boundary conditions predominate.

Technical Papers

The Impact of Surface Condition and Lubricant on Gear Tooth Friction

Frictional losses in gear boxes are of significant interest to gear box designers as these losses transform into heat.  The direct result is a reduction in the fuel efficiency of the vehicle involved.

Technical Papers

An Evaluation of the New Rapid ISF® Process for Rear-Axle Gears

The benefits gained by Superfinishing rear-axle gearsets using traditional chemically accelerated vibratory finishing is well documented.

Technical Papers

Superfinishing Rear Axle Gears – A Significant Step Toward Reducing Automotive Greenhouse Gas Emissions

New regulations make it imperative that the European and US automotive industries meet strict, lower greenhouse gas emission standards.

Technical Papers

Comparative Corrosion Characteristics of Ground and Superfinished Gear Steels

The described effort was undertaken to assess the impact of the isotropic superfinishing (ISF®) process on the corrosion resistance of a variety of gear steels.

Technical Papers

The Effect of the Surface Roughness Profile on Micropitting

A wide choice of surface roughness parameters is available to characterize components, such as gears or bearings, with the goal of predicting the performance of such metal–to–metal contacting parts.

Technical Papers

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.

Technical Papers

Superfinishing Motor Vehicle Ring and Pinion Gears

Today, the motor vehicle market is focusing on “lubed for life” differentials requiring no service for the life of the vehicle. Still, differentials are prone to develop problems of one sort or another since they are used to transmit a heavy torque through a right angle.

Technical Papers

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.

Technical Papers

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.

Technical Papers

Isotropic Superfinishing of S-76C+ Main Transmission Gears

Isotropic Superfinishing is a chemically accelerated vibratory finishing process that is capable of generating surface finishes with an Arithmetic Mean Roughness (Ra)< 3 min.

Technical Papers

Repair of Helicopter Gears

In order to reduce costs by extending the operational life of the sun and input pinion gears of a helicopter transmission, scraped gears were subject to a superfinishing process.

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