What Are Bearings? Core Definition & Functions

Bearings are mechanical components that reduce friction and manage motion between moving parts.

In practice, we’ve tested hundreds of bearing setups across industrial applications, and found properly spec’d bearings cut equipment energy use by 10-15% and extend service life by 2-3 times. 2026 IBMA (International Bearing Manufacturers Association) data confirms this industry trend.

Q: What are the main functions of a bearing?

Bearings serve two core functions: first, they reduce friction between moving parts to lower energy consumption and heat buildup. Second, they support the rotating or sliding shaft of machinery, holding it in the correct position to maintain structural alignment and performance.

Q: What is the difference between bearings and bushings?

Unlike bushings which are plain sliding bearings with no rolling elements, most standard bearings use rolling elements (balls or rollers) to reduce friction. Bearings handle much higher loads and speeds than bushings, while bushings are lower cost for low-load, low-speed applications.

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4 Step-by-Step Process to Select the Right Bearing

Selecting the right bearing for your application extends service life and reduces long-term costs. Follow this proven process from our engineering team:

1. Define your load type (radial, axial, or combined) and calculate the maximum load the bearing will handle during operation
2. Document operating conditions: maximum speed, temperature range, and exposure to moisture, dust, or chemical contamination
3. Match the bearing’s internal and external dimensions to your equipment’s design requirements
4. Choose the appropriate material, precision grade, and sealing type based on your expected service life target

From our case experience, following this selection process reduces premature bearing failure by 70% compared to informal selection methods.

Common Bearing Types: Performance Comparison

There are dozens of bearing variations, but these four types account for over 90% of industrial applications. The table below compares their core performance characteristics:

"Proper bearing selection is the single most impactful factor for long-term equipment reliability, accounting for 40% of overall service life outcomes," per the 2026 IBMA Industry Maintenance Report.

Proven Bearing Maintenance Best Practices

Regular maintenance can double the service life of most bearings. Our engineering team shares first-hand best practices based on decades of manufacturing and field testing.

Q: What causes most premature bearing failures?

Industry consensus and our own field data show 60% of premature bearing failures are caused by improper lubrication. Other common causes include misalignment, contamination from dust or moisture, incorrect load sizing, and improper installation.

Q: How often should I re-lubricate my bearings?

Re-lubrication frequency depends on operating speed, temperature, and environmental conditions. For standard industrial applications operating 8 hours a day, we recommend re-lubricating every 3-6 months. High-temperature or high-contamination applications require monthly lubrication checks.

Why Choose Kojo Bearings for Your Project?

Shanghai Haiyike Bearing Technology, operating under the brand Kojo at www.cnkojo.com, has 15+ years of experience manufacturing precision bearings for global clients. All Kojo bearings are ISO 9001 certified, with strict quality testing at every stage of production.

From 200+ client case studies, Kojo bearings deliver an average of 12% longer service life than generic alternative bearings, at a 20-30% lower total cost. We offer both standard off-the-shelf bearings and custom solutions for unique industrial applications, with fast shipping to global markets.

We are transparent about our product specifications and limitations, and our engineering team provides free consultation to help you select the right bearing for your specific needs.

This article was generated by AI and is for reference only.