Proper bearing maintenance is essential for ensuring reliable machinery performance and maximising service life. Bearings play a critical role in reducing friction and supporting loads in rotating equipment, and poor handling, contamination, or incorrect installation can quickly lead to premature failure.

By following a few straightforward maintenance practices, businesses can reduce downtime, extend equipment lifespan, and improve operational efficiency.

The following seven steps outline best practices for maintaining bearings in industrial machinery.

 Typical bearing maintenance process used in industrial machinery.

Step One: Handle and Store Bearings Properly

The first step is correct handling and storage. Bearings are precision components that can easily be damaged or contaminated if handled improperly.

Always wear clean gloves when handling bearings to prevent corrosion caused by moisture, sweat, or oils from the skin. Even small contaminants can affect bearing performance over time.

Store unused bearings in their original packaging in a clean, dry environment. Keeping bearings sealed until installation helps prevent dust, dirt, or moisture from entering the component before it is installed.

Dropping or mishandling bearings can cause internal damage that may not be immediately visible but could lead to early failure during operation.

Step Two: Inspect Shafts and Housings

Before installing a bearing, it is important to inspect the shaft and housing for damage, contamination, or irregularities.

Ensure that mounting surfaces are clean and free from burrs, scratches, or debris. Even minor imperfections can affect bearing alignment and lead to excessive vibration, noise, or reduced service life.

A properly prepared shaft and housing ensure that the bearing fits correctly and operates smoothly once installed.

Step Three: Check Alignment and Fit

Proper alignment is essential for reliable bearing performance. Misalignment between shafts and housings can place uneven loads on the bearing, increasing friction, vibration and premature wear.

Ensuring correct shaft alignment and proper fit helps distribute loads evenly across the bearing and improves overall service life.

Step Four: Follow Correct Mounting Procedures

Bearings should always be installed using the appropriate mounting techniques recommended by the manufacturer.

During installation, pressure should be applied evenly to the correct bearing race to prevent damage to the rolling elements or internal components. Incorrect mounting methods can introduce unnecessary stress into the bearing and reduce its operational life.

The correct installation method will depend on factors such as bearing type, shaft fit, load conditions, and operating speed.

 Step Five: Ensure Correct Lubrication

Lubrication is critical for reducing friction, preventing overheating and protecting bearing surfaces from wear. The correct lubricant type and quantity depend on operating conditions such as speed, load and temperature.

Both grease and oil lubrication systems are commonly used depending on the application.

 Step Six: Prevent Bearing Contamination and Corrosion 

Contamination is one of the most common causes of premature bearing failure. Dust, moisture, metal particles, and other foreign materials can enter the bearing and cause excessive wear.

Proper sealing, correct lubrication, and maintaining a clean working environment can help prevent contaminants from entering the bearing assembly.

In addition, corrosion can occur if bearings are exposed to moisture or harsh environmental conditions. Applying appropriate lubrication and protective coatings can help reduce this risk and extend bearing lifespan. 

Step Seven: Monitor and Replace Bearings Proactively

Regular monitoring helps identify early warning signs of bearing wear or failure. Increased vibration, unusual noise, overheating, or reduced efficiency can all indicate developing bearing problems.

Common warning signs of bearing wear include:

• increased vibration
• unusual noise
• overheating
• reduced equipment efficiency

Monitoring these indicators allows maintenance teams to identify potential issues early and replace bearings before unexpected failure occurs.

Because bearings have a finite service life, proactive replacement as part of a planned maintenance schedule is often far more cost-effective than emergency repairs caused by sudden failure.

Learn More About Bearings

For more information about bearings, mechanical power transmission systems, and related components, download our Ultimate Guide to Bearings, Mechanical Power Transmissions and Linkages.

At BTL-UK, we supply a wide range of bearings and engineering components used across many industries. If you need help selecting the right bearings for your application, our experienced team can provide expert advice.

Contact the BTL-UK team today to learn more.

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