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The Importance of Proper Grease and Lubrication
Rolling bearings are precision components that use balls or rollers to carry loads with minimal resistance, making them ideal for a wide range of applications. Known for their durability and long service life, these bearings can last for thousands of operating hours or millions of rotations, depending on the conditions and usage.
Over 99% of rolling bearings perform as expected throughout their intended lifespan. However, premature failure—often caused by rust, corrosion, pitting, or misalignment—is usually avoidable. To prevent such issues, it's essential to maintain proper lubrication. A thin layer of lubricant between the rolling elements and raceways helps reduce wear and protect the bearing from damage over time.
Engineers commonly choose grease for lubrication due to its ease of application and sealing properties, which help keep contaminants out. Oil is another popular option, especially in high-speed or high-temperature environments, where its ability to dissipate heat makes it more effective than grease.
Proper lubrication offers several benefits, including:
- Reducing friction and metal-to-metal contact
- Removing heat generated during operation
- Extending the bearing’s service life
- Preventing rust and corrosion
- Protecting against contamination and foreign particles
Like the bearings themselves, lubricants also have a limited shelf life and must be replenished regularly. Failing to do so can lead to poor performance or even failure. When applied correctly, lubrication significantly improves bearing reliability and ensures smooth, efficient operation.
However, there are some common mistakes to avoid when lubricating bearings:
- Choosing the wrong type of lubricant: Grease and oil each have unique advantages, and the right choice depends on the application’s requirements.
- Using too much or too little lubricant: Excess lubricant can increase internal temperature, while insufficient lubrication leads to direct contact and wear.
- Mixing different types of lubricants: Combining grease and oil can reduce effectiveness and cause system issues.
- Allowing contamination: Water, dust, or other debris can compromise the lubricant’s performance and damage the bearing.
At Emerson Bearing, we've been dedicated to providing quality bearings and expert advice for over 50 years. Whether you're looking for a rare bearing or need guidance on the best lubricant for your system, our team of specialists will analyze your needs and offer tailored recommendations.
To learn more about the importance of precision bearings and how to maintain them effectively, download our free eBook: *The Art of Precision Bearings*. It's a valuable resource for engineers, technicians, and anyone involved in industrial maintenance.