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Protection and protection of deep groove ball bearings
**Protection and Application of Deep Groove Ball Bearings**
Home > Bearing Knowledge > Application and Protection of Deep Groove Ball Bearings
*Created on 2018/5/16*
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**Protection and Application of Deep Groove Ball Bearings**
Source: China Bearing Network | Time: 2014-05-14
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Since the reform and opening-up policy, China has gradually integrated into the global market through international competition. The bearing industry has developed steadily and rapidly. According to the annual report of the National Bureau of Statistics, in 2004, there were 927 state-owned and non-public enterprises with annual sales over 5 million yuan in the bearing sector. In 2003, the total output value of bearings reached 4.1 billion sets, with sales revenue of 39.2 billion yuan. China's bearing sales ranked fourth globally, making it a major player in the international bearing market. Especially in miniature and small deep groove ball bearings, China has become the most productive country.
Deep groove ball bearings are a sub-class of bearings widely used in modern equipment due to their extensive application and long service life. Their high precision and quality have significantly improved equipment performance. As technology continues to advance, these bearings will be even more widely used in future equipment, leading to broader market opportunities.
The widespread use of deep groove ball bearings is largely due to the recognition by equipment operators. These bearings have been accepted for their excellent performance. Over the years, many professionals have worked on mechanical equipment protection and have encountered deep groove ball bearings in various forms. They have gathered experience and insights about their application and maintenance, which they now share with others.
Deep groove ball bearings typically consist of two inner and outer rings, a set of rigid balls, and a cage. They are denoted by the code "6" and are the most commonly produced and used type of bearing. Their simple design makes them easy to use and highly efficient in accepting radial loads, as well as some axial loads. When the radial clearance increases, they can also function like angular contact bearings, allowing for greater axial load capacity.
These bearings are primarily designed to handle pure radial loads but can also manage combined radial and axial loads. When only radial loads are present, the contact angle is zero. However, when the bearing diameter increases, it can act like an angular contact bearing, capable of handling larger axial loads. The friction coefficient of deep groove ball bearings is very low, ensuring smooth operation and long life.
They are known for their simplicity, high production accuracy, and cost-effectiveness. This makes them ideal for mass production and wide application. Depending on the clearance selection, axial loads can be applied, and different types of cages—such as stamped wave, solid, or nylon—are used based on the application.
In addition to the basic model, there are several variants, including sealed, dust-covered, snap-groove, and double-row versions. Despite their variations, all deep groove ball bearings share common features:
1. Each ring has a continuous groove that covers about one-third of the ball’s circumference, mainly for radial load support.
2. Increased radial clearance allows for angular contact characteristics, enabling bidirectional axial load handling.
3. Simple structure, low production cost, and high precision make them suitable for mass production.
4. Stamped wave cages are commonly used, while solid or nylon cages may be used for larger diameters or high-speed applications.
**Equipment Protection and Maintenance**
Deep groove ball bearings are among the most commonly used rolling bearings. They are suitable for high-speed operations and offer low maintenance costs and long service cycles. However, regular professional checks are essential to ensure safe and reliable operation, improving both efficiency and lifespan.
Proper installation is critical. Technicians must follow strict procedures to ensure accurate fit and performance. Key steps include cleaning the bearing and related parts, checking the dimensions and finish of mating components, and using appropriate installation methods such as press-fit or heating.
Press-fit installation involves applying pressure directly to the inner ring without transmitting force through the rolling elements. For large interference fits, heating the bearing or housing can help reduce the required force. Care must be taken to avoid overheating and damage during this process.
After installation, immediate inspection is necessary to confirm proper seating and alignment. Regular maintenance includes checking operating temperature (should be below 65°C), axial movement, and the condition of the raceway for defects. Proper lubrication is also crucial—oil should be filled to one-third to half its capacity, and grease should not be overfilled.
**Case Study: Urea Hydrolysis Equipment**
A real-world example involved a urea hydrolysis pump used in wastewater treatment. The pump was multi-stage, high-speed, and high-pressure, but frequent failures affected production. After analysis, it was found that the bearing type was unsuitable. By replacing it with deep groove ball bearings and implementing proper installation and maintenance procedures, the system operated smoothly, significantly increasing the service life and supporting stable production.
**Conclusion**
China's demand for bearings continues to grow across industries such as automobiles, motorcycles, home appliances, and automation. Major projects like the South-North Water Diversion and the Shanghai World Expo further highlight the need for advanced machinery and equipment. The widespread use of deep groove ball bearings is driving improvements in equipment quality and contributing to China’s modernization efforts.
As equipment operators, we must take responsibility and strive for excellence in our work, supporting the development of China’s manufacturing industry.
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*Please cite: China Bearing Network – http://*
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