bearing failure analysis
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bearing failure analysis
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A good plain bearing supplier can make a massive difference for you company.
- Plain bearing failure analysis is important in every link
The purpose of plain bearing failure analtsis and inspecting damaged bearings and their mating parts is to determine the probable causes of the bearing failure and to avoid any future failures.
Plain Bearing life and bearing failures solution
Causes of plain bearing failure
Here Are The Seven Most Common Reasons Why Plain Bearings Fail:
Types of Plain Bearings (Bushings)
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Quality materials you can rely on Quality/Reliability Material allows for compact design Common to One Piece Compact Bushing Design…
Self-lubricating bushings can vary considerably in both material and design style.
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Carbon steel self-lubricating, Metallic composite self-lubricating bearing.
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Graphite Plugged Bronze Bushing
Self-lubricating bearings: flanged-sleeve bearings made of plugged graphite bronze C86300 are available.
Metal-ploymer POM Bushing
Marginal pb-free self-lubricating bearing
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Monometallic self-lubricating bearing, Bronze self-lubricating bearing with through holes
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We offers the industry’s trusted bearing failure analysis, as well as causes of bearing failure and plain bearing bushes products.
The plain bearings are ideal for earth moving machinery, drilling machinery, industrial equipment and more.
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WHAT ARE THE MOST FREQUENT CAUSES OF BEARING FAILURE FOR YOUR BEARING APPLICATIONS?
While it may seem like common sense, standard wear and tear is one of the recognized causes of plain bearing failure.
Improperlubrication is the major cause of sliding bearing failure.
Bearings can only achieve maximum performance levels with adequate lubrication.
Plain bush bearings type
- Cylindrical bushings bearing
- Flanged bushings sleeve
- Thrust Washers
- Strips
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Did you know that external environmental factors and improper mounting are the most common causes of bearing failure? The bearing type, application and situation are all unique, so you must carefully consider a number of factors before coming to a conclusion about what’s causing your bearings to fail.
COMMON FACTORS THAT LEAD TO PLAIN BEARING FAILURE – FAILURE ANALYSIS
CONTAMINATION
Causes: Dirt, abrasive grit, link, dust, steel chips from contaminated work areas, dirty hands or tools, or foreign matter in lubricants or cleaning solutions.
What to look for: Denting of rolling elements and raceways, causing vibration
How to fix it: Filter the lubricant, clean work areas, tools, fixtures, and hands to reduce the risk of contamination.
IMPROPER MOUNTING
Causes: Improper installation of the mounting. In most instances, bearings should be mounted with a press fit on the rotating ring.
What to look for: These are some of the prevalent conditions that can cause denting, wear, cracked rings, high operating temperature, early fatigue, and premature failure of bearings (among many others).
-Mounting bearings on shafts by applying pressure or blows to the outer race
-Mounting bearings into a housing by pressing on the inner ring
-Loose shaft fit
-Loose housing fit
-Excessive tight fits
-Out of round housings
-Poor finish on the bearing seat
How to fix it: Install mountings properly, and provide training to ensure all employees understand the difference between a properly and improperly installed mounting.
MISALIGNMENT
Causes: Commonly caused by bent shafts, out-of-square shaft shoulders, out-of-square spacers, out-of-square clamping nuts or improper installation due to loose fits. Misalignment can result in overheating and separator failure.
What to look for: A wear path not parallel to raceway edges on the raceway of the non-rotating ring.
How to fix it: Inspect shafts and housings for runout of shoulders and bearing seats, use precision grade locknuts.
FALSE BRINELLING
Causes: The rapid movement of the balls in the raceway while the equipment is idle. The quickly moving elements remove the lubrication, and lack of rotation in the bearing does not allow fresh lubricant to return to the spot.
What to look for: Linear wear marks in axial direction at the rolling element pitch, no raised edges as opposed to marks due to incorrect mounting.
How to fix it: Eliminate or absorb external vibration, and use lubricants containing anti-wear additives.
Plain bearing failures can occur for a variety of reasons, often related to the construction, material selection, production, and operational conditions of the bearing. Here’s a summary of the key points regarding plain bearing failure based on the search results provided:
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Common Causes of Failure: The basic causes of damage and failure of plain or sliding bearings can include errors during production (such as inadequate budgeting, material mistakes, and irregularities during production and installation), errors during exploitation, wear during long-term operation, and other factors like unforeseen exposure to overload or direct mechanical or chemical damage during operation.
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Failure Manifestations: Failures and damages are often manifested as wear, breakage, and plastic deformation of the material. These can be categorized into two types related to material properties: those connected to the strength of the material (like fracture and plastic deformation) and those related to tribological processes (like wear and tear).
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Diagnostic Models: Vibration analysis and thermal analysis are crucial for the early detection of plain bearing failures. These diagnostic models can help detect problems at their formation stage, which is essential for system maintenance, reliability, and economic considerations.
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Failure Mechanisms: The most frequent manifestation of failure in sliding bearings is wear, which can be abrasive, adhesive, or due to surface fatigue. Other types of wear are less common. These indicators are important when defining a bearing condition monitoring program.
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Importance of Lubrication: Lubrication plays a critical role in the life and performance of plain bearings. Issues such as inadequate gap, inadequate supply of lubricants, or inadequate lubricant characteristics can lead to bearing failure.
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Detection and Prevention: Monitoring technologies like vibration and temperature monitoring can help in the detection of bearing issues before they lead to complete failure. Proper maintenance and understanding of the bearing’s operating conditions are vital in preventing failures.
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Systematic Failure Analysis: Incorrect assembly, use, and maintenance are often the main causes of bearing failure. A systematic failure analysis involves using various techniques, including microscopic investigation, chemical composition analysis, and metallographic analysis, to determine the cause and mechanism of failure.
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Bearing Materials: The choice of bearing materials is critical, with special bearing steels being commonly used for their fatigue resistance, wear resistance, high hardness, and stiffness. Heat treatment procedures are essential to ensure the required properties of the bearing materials.
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Cage Design: The cage in rolling bearings is important for managing the rolling element arrangement and acts as a potential weak link. Cage materials can vary based on operating conditions.
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Environmental Factors: External factors such as corrosive media or hard abrasive particles can cause damage and premature failure if they enter the bearing.
By understanding these aspects, engineers and maintenance personnel can take appropriate measures to prevent plain bearing failures, or at least predict and diagnose them before they lead to more significant and costly equipment downtime.
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