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Documenti tecnici
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.
Documenti tecnici
High Speed, Automatable Superfinishing of Rear-Axle Hypoid Gears
By: Michael Frechette, Gary Sroka, Matt Bell-REM Surface Engineering and REM Research Group Technical Papers and White Papers The benefits […]
Documenti tecnici
A Novel Approach to the Refurbishment of Wind Turbine Gears
By: M. Michaud, REM Surface Engineering, G. J. Sroka and R. E. Benson, REM Research Group Technical Papers and White […]
Documenti tecnici
Gear Corrosion During the Manufacturing Process
By: O. El-Saeed and G. Sroka, REM Chemicals Inc. and G. Blake Rolls-Royce Corporation
Abstract
No matter how well gears are designed and manufactured, gear corrosion can occur that may easily result in catastrophic failure. Since corrosion is sporadic and a rare event and often difficult to observe in the root fillet region or in finely pitched gears with normal visual inspection, it may easily go undetected. This paper presents the results of an incident that occurred in a gear manufacturing facility several years ago that resulted in pitting corrosion and intergranular attack (IGA). It showed that superfinishing can mitigate the damaging effects of IGA and pitting corrosion, and suggests that the superfinishing process is a superior repair method for corrosion pitting versus the current practice of glass beading.
Documenti tecnici
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.
Documenti tecnici
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.
Documenti tecnici
The Effect of Superfinishing on Gear Micropitting, Part II
By: Lane Winkelmann, Omer El–Saeed and Matt Bell, REM Chemicals Inc. Technical Papers and White Papers One of the most […]
Documenti tecnici
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.
Documenti tecnici
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.
Documenti tecnici
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.
Documenti tecnici
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.
Documenti tecnici
Evaluation of the Scuffing Resistance of Isotropic Superfinished Precision Gears
The high performance required from aerospace gears places stringent requirements upon the metallurgical quality, geometry, and surface finish of mating parts.
