Signs it’s Time for a Bearing Replacement

Bad bearings don't fix themselves. Strange noises, excess heat, or shaky equipment are all signs it's time for a bearing replacement. Catch the warning signs early and avoid bigger headaches down the line.

The Cost of Waiting Too Long

Ignoring worn-out bearings is a gamble that rarely pays off. Bad bearings create friction, which leads to overheating and extra strain on nearby parts. That strain can cause sudden equipment failure, expensive repairs, and production slowdowns. A simple bearing swap is way cheaper than replacing a damaged shaft or dealing with unplanned downtime. Pay attention to the warning signs and replace bearings early. It saves money, prevents headaches, and keeps everything running like it should.

What Causes Bearings to Wear Out?

Bearings don't last forever, but certain factors can wear them out faster than expected. If you're noticing issues, one of these common causes could be to blame.

• Lack of proper lubrication
• Misalignment or improper installation
• Excessive load or overuse
• Contamination from dirt, dust, or moisture
• Natural wear over time

Common Warning Signs of Bearing Failure

Pay attention to these warning signs before a small problem turns into a big one.

• Unusual noise - Grinding/squealing/knocking sounds
• Excessive vibration - Rough operation/machinery shaking
• Increased temperature - Bearings running hotter than usual
• Visible wear - Cracks/pitting/discoloration
• Lubrication issues - Dry bearings/leaking grease/contamination
• Reduced performance - Equipment slowing down/losing efficiency
• Rust/corrosion - Signs of moisture exposure
• Loose/misaligned bearings - Improper fit can cause early failure
• Dirt/debris buildup - Contaminants affecting performance

How to Extend Bearing Life

Taking care of your bearings keeps equipment running longer and helps avoid unexpected failures. Here's what you need to do:

1. Regular Inspections and Maintenance

Check bearings often for signs of wear, noise, or overheating. If something seems off during your bearing maintenance, address it before it turns into a bigger problem. Clean bearings as needed and replace damaged ones before they fail.

See "Common Warning Signs of Bearing Failure" section

2. Proper Lubrication Practices

Lubrication reduces friction, prevents overheating, and extends bearing life. Using the right lubricant and applying it correctly is key.

Choosing the Right Lubricant

• Grease vs. Oil - Grease lasts longer, while oil works better for high speeds and temps.
• Viscosity Matters - Too thick slows movement, too thin won't protect.
• Additives Help - Anti-wear and anti-corrosion additives improve durability.

Best Practices

• Follow a Schedule - Lubricate at regular intervals based on usage.
• Don't Overdo It - Too much grease traps heat and pressure, causing damage.
• Keep It Clean - Contaminants break down lubrication and wear out bearings faster.

3. Choosing the Right Bearing Replacements for Your Application

Not all bearings are the same. Some are built for high speeds, while others handle heavy loads or extreme temperatures. Using the wrong type can cause premature failure. Work with an expert to make sure you're using the best option for your equipment and environment.

Check out our bearing selection guide

4. Monitoring Load and Speed Limits

Pushing bearings past their design limits wears them out faster. Check the manufacturer's specs for load capacity and speed ratings. If your equipment is running harder or faster than the bearings can handle, consider upgrading to a stronger or more durable option.

When to Repair vs. When to Replace

Condition	Repair or Replace?
Dirty/Dry Bearings	Repair - Clean and re-lubricate
Loose Fittings	Repair - Adjust or re-tighten
Minor Surface Wear	Repair - Monitor and improve lubrication
Loud Grinding/Knocking	Replace - Internal damage likely
Excessive Heat/Vibration	Replace - Bearing failure imminent
Visible Damage	Replace - Cracks, rust, or deformation present
Frequent Repairs	Replace - Continuous issues indicate end of life

Contact DXP for industrial maintenance services.

Need Help Finding the Right Bearing Replacements?

Not sure which bearings you need or when to replace them? DXP has just what you need. We carry a vast selection of bearings and power transmission products from the top manufacturers in the market. So if you're dealing with any of the issues mentioned in this guide, give us a call - our experts are here to help!

Reach out today to learn more about our bearing replacement options.