micropitting | REM Surface Engineering

Vibratory Media Compositions vs. Attrition and Density

Posted by Bill Nebiolo on martedì, Ottobre 1st, 2019 in

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. ...

Measuring Tooth Flank Roughness

Posted by Mark Michaud on mercoledì, Gennaio 23rd, 2019 in

Gear performance has continuously increased over the past two decades. Improvements in metals, heat treatments, geometry, and lubrication are just a few of the sources of these improvements....

AN ANALYSIS OF A LOSS OF LUBRICATION TEST OF ISOTROPIC SUPERFINISHED GEARS WITHOUT BLACK OXIDE COATING

Materials Matter : Surface Finishing Rotorcraft Gearing

Posted by Danny Estrada on mercoledì, Ottobre 3rd, 2018 in

Rotorcraft gearboxes are designed with 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....

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 mercoledì, Settembre 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....

The Effect of Superfinishing on Gear Micropitting II

The Effect of Superfinishing on Gear Micropitting, Part II

Posted by Danny Estrada on martedì, Novembre 19th, 2013 in

It should be noted from the outset that the data presented in Part I and Part II of this paper was generated by independent laboratories. Superfinishing of the gears was the authors’ sole contribution to these studies....

A Novel Approach to the Refurbishment of Wind Turbine Gears

Posted by Danny Estrada on mercoledì, Novembre 13th, 2013 in

Multi-megawatt wind turbine gearboxes operate under demanding environmental conditions including considerable variation in temperature, wind speed, and air quality....

Materials Matter: Micropitting

Posted by Martin McCormick on sabato, Settembre 17th, 2016 in

Micropitting is a gear failure mode that typically occurs when higher contact stresses are applied to hardened gear teeth. Unlike most other failure modes, micropitting does not always proceed to component failure if left unaddressed....

Materials Matter: Scuffing

Posted by Martin McCormick on sabato, Settembre 17th, 2016 in

Gear meshing is one of the most complex areas of study in tribology. Meshing consists of both sliding and rolling motion and can be affected by a number of other operating parameters....

Materials Matter: Wind Turbine Gear Repair

Posted by Christina Michaud on martedì, Maggio 31st, 2016 in

Due to the large installed base of wind turbines, demand for gearbox repairs has risen steadily in recent years. Isotropic […]...

Comparative Corrosion Characteristics of Gear Steels 1

Comparative Corrosion Characteristics of Ground and Superfinished Gear Steels

Posted by David Smith on venerdì, Novembre 15th, 2013 in

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....

The Effect of the Surface Roughness Profile on Micropitting

Posted by Christina Michaud on martedì, Novembre 19th, 2013 in

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....

A Novel Approach to the Refurbishment of Wind Turbine Gears

Posted by Mark Michaud on martedì, Novembre 19th, 2013 in

By: M. Michaud, REM Surface Engineering, G. J. Sroka and R. E. Benson, REM Research Group Technical Papers and White […]...