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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 from the National Bureau of Statistics, in 2004, there were 927 state-owned and state-controlled enterprises, as well as non-state enterprises with annual sales exceeding 5 million yuan. In 2003, the total output value of the bearing industry reached 4.1 billion sets, with sales revenue of 39.2 billion yuan. China's bearing sales have climbed to the fourth place globally, becoming a major player in the international bearing market. Especially in miniature and small deep groove ball bearings, China is now the world’s leading producer.
Deep groove ball bearings are a sub-class of rolling bearings that are widely used due to their versatility and long service life. They are commonly found in modern machinery, where precision and quality are essential. As equipment technology advances, the demand for these bearings will only grow, making them an integral part of future industrial development. Their widespread use has been driven by the trust and acceptance of operators who rely on their performance. Over the years, I've gained experience in maintaining and protecting mechanical equipment, and I’ve learned a lot about how to apply and maintain deep groove ball bearings effectively.
A deep groove ball bearing typically consists of two raceways, a set of steel balls, and a cage. It is denoted by the code “6†and is the most commonly produced and used type of bearing. Its simple design makes it easy to use, and it can handle both radial and axial loads. When the radial clearance increases, it can also function like an angular contact bearing, allowing it to withstand significant axial forces.
These bearings are primarily designed to handle pure radial loads, but they can also support combined radial and axial loads. When only radial loads are present, the contact angle is zero. However, when the diameter increases, the bearing can act more like an angular contact bearing, capable of handling larger axial loads. The friction coefficient is low, which helps reduce wear and extend the bearing’s lifespan.
One key advantage of deep groove ball bearings is their ability to operate even if the shaft is slightly misaligned (within 8–16 degrees of clearance). However, such misalignment may reduce the bearing’s overall life. Compared to other bearing types, deep groove ball bearings are relatively easier to manufacture with high precision, which leads to lower production costs and higher efficiency in mass production.
In addition to the basic model, there are various modified designs, including sealed bearings, dust covers, snap ring grooves, and double-row versions. Despite their differences, all deep groove ball bearings share common characteristics:
1. Each raceway has a continuous groove that covers approximately one-third of the ball’s circumference, mainly for radial load support.
2. With increased radial clearance, the bearing behaves like an angular contact bearing, capable of handling axial loads in both directions.
3. Simple structure and cost-effective manufacturing.
4. Typically uses a stamped wave cage, while larger bearings or those operating at high speeds may use a solid or nylon cage.
Equipment protection is crucial for deep groove ball bearings, which are among the most widely used rolling bearings. They are suitable for high-speed operations and offer low maintenance costs and long service life. However, regular inspection and professional care are necessary to ensure safe and reliable operation. Proper installation and maintenance not only improve efficiency but also enhance the bearing’s longevity.
When installing deep groove ball bearings, it is important to follow proper procedures. This includes 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. The choice of method depends on the fit between the bearing and the housing or shaft.
Regular checks during operation are equally important. Monitoring temperature, axial movement, and lubrication levels can prevent failures and prolong the bearing’s life. If any defects are found, such as pitting or corrosion, timely action should be taken.
An example of successful application is in urea hydrolysis equipment, where deep groove ball bearings were chosen after analysis showed that previous bearing types were unsuitable. After implementing the correct bearing selection and maintenance procedures, the equipment operated smoothly, significantly increasing the production cycle and supporting stable output.
In conclusion, China’s demand for bearings continues to rise across various industries, including automotive, household appliances, and large-scale infrastructure projects. The wide application of deep groove ball bearings contributes to the improvement of equipment quality and supports the country’s modernization efforts. As equipment operators, we must take responsibility and ensure the best possible performance of our machinery.
Recommended Reading:
- Understanding FAG spherical roller bearing codes
- How to properly clean INA textile-sealed bearings
- Analyzing brake valve failure reasons in fine instrument bearings
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Protection and protection of deep groove ball bearings
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Source: China Bearing Network | Time: 2014-05-14