What is Heathcote Slip?
What is heathcote slip and what can it lead to in Main Shaft Bearings?
Are DLC coatings no longer cutting it?
DLC is failing. Once used as an upgrade on most main bearing applications the limits of this coating technology are being found leading to accelerated failures of rollers.
Main Bearings: What is peeling damage?
Peeling damage is one of the most common main bearing failures. What is it and what can do you do to control it?
What are Super Tough bearings?
Super Tough bearings have track record of improving bearing life in the toughest application. What is it exactly that makes these bearings so much different than their traditional through hard and case carburized counterparts?
False Brinelling
Brinelling occurs mainly from excessive loading or impacts. False brinelling however while similar has different underlying causes and symptoms.
Blade Bearing Cracking Rings Part 2: Causes and solution
What causes ring cracking in blade bearings, and how to solve it.
Blade Bearing Cracking Rings Part 1: What to look for
Outer ring cracks on blade bearings of a WTG can lead to loss of a blade. It’s critical to identify early and shutdown the turbine to plan for replacement.
Electrical discharge in generator bearings.
Electrical discharge is common in wind turbine generator bearings.
What is Black Oxide?
What is black oxide coating and how can it help improve the life of WTG gearbox bearings?
Blade Bearing Basics
Overview of the construction and application loading of the 2-row 4-point contact slewing bearing used as blade bearings in Wind.
Pitch System Performance
There are several components in the pitch system. All of these components can contribute to common pitch system faults like Blade Angle Asymmetry.
Through Hardened vs Case Hardened Bearings
Standard bearings are through hardened, but upgrading to a case hardened bearing has a lot of benefits in demanding applications. Read more about the difference between these bearing types.
Special Bearing Used in GE Pitch Motors
The OEM uses a 6206 with special grease, high temp seals, and high heat stabilized rings. This special bearing has also been upgraded to include ceramic balls.
Relevant Published Articles
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Malloy Wind Company Profile
History of Malloy Electric and our support of the Wind market.
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Cracking Blade Bearings
What causes blade bearing cracks and where to find them before it’s too late.
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White Structure Flaking in Rolling Bearings for Wind Turbine Gearboxes
An investigation into the failure modes yielding white structure flaking and axial cracking in wind turbine gearbox rolling bearings
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Blade Bearing Cage Failure
Cage failure of blade bearings at 5 years or less.