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There are significant differences in performance, quality and service life of low-priced bearings and high-priced bearings. The main differences are reflected in the following aspects: 1. Materials and manufacturing processesLow-priced bearings:Ordinary steel or low-quality alloys are usually used, with poor hardness and wear resistance.The manufacturing process is simple, the accuracy is low, and there may be problems such as burrs and high roughness.High-priced bearings:Use high-quality bearing steel (such as GCr15, SUJ2) or special alloys (such as stainless steel, ceramic mixed materials).After precision processing (such as grinding, super-finishing), the surface finish is high and the tolerance control is strict.2. Accuracy and performanceLow-priced bearings:The accuracy level is low (such as P0 level or non-standard level), and the vibration and noise are high when rotating.It is easy to generate heat during high-speed operation and has a short lifespan.High-priced bearings:High precision level (such as P5, P4 and even P2 levels), suitable for precision machinery (such as machine tools and instruments).It can still maintain stable operation under high speed and high load, with low noise and low temperature rise.3. Lubrication and sealingLow-priced bearings:Using ordinary grease is easy to volatile and oxidize, and requires frequent maintenance.The sealing structure is simple (such as single-layer rubber seal), and the dust-proof and waterproof performance is poor.High-priced bearings:Use high-performance lubricants (such as fully synthetic grease) for long-term maintenance-free.Multi-seal design (such as contact + non-contact seal), with strong dustproof, waterproof and corrosion-proof capabilities.4. Lifespan and reliabilityLow-priced bearings:Under standard load, lifespan is short and prone to early failure (such as peeling and stuck).Suitable for low-load, intermittent working scenarios (such as household appliances, ordinary machinery).High-priced bearings:After strict life tests (such as L10 life calculation), high durability.Suitable for high load, continuous working environments (such as industrial motors, automotive gearboxes).Kent Bearings specializes in manufacturing high-quality silent motor bearings for more than 20 years. Using Kent Bearings can reduce after-sales costs. Kent Bearings with long life are the best choice to ensure the stable operation of your products. Contact:19957426729(WhatsApp)     bugao@bgbearing.com(Email)

Angular contact ball bearings are precision bearings designed to handle combined radial and axial loads (unidirectional or bidirectional). Their key feature is the contact angle, which enables superior axial load capacity compared to deep groove ball bearings. 1. Basic Construction Angular contact bearings consist of the following components: Component Function Inner Ring Fits onto the shaft, with a raceway to support rolling elements. Outer Ring Mounts in the housing; its raceway is offset to create the contact angle. Rolling Elements Steel or ceramic balls that transmit loads between rings. Cage Holds balls in place (made of nylon, brass, or steel). Contact Angle (α) Critical design parameter. The angle between the load line and radial plane (typically 15°, 25°, or 40°). 2. Working Principle (1) Role of the Contact Angle (α) Definition: The angle formed between the line connecting ball-to-raceway contact points and the radial plane. Impact: Larger α (e.g., 40°) → Higher axial load capacity. Smaller α (e.g., 15°) → Better radial load handling. (2) Load Transmission Mechanism Radial Load: Transferred from the inner ring to the outer ring via rolling elements. Axial Load: Due to the contact angle, axial force is decomposed into radial and axial components, both supported by the bearing. 3. Bearing Arrangement (Paired Mounting) To improve rigidity and load capacity, angular contact bearings are often paired: Arrangement Characteristics Applications Back-to-Back (DB) Wider outer ring faces outward; high moment rigidity (for cantilever loads). Machine tool spindles. Face-to-Face (DF) Narrower outer ring faces inward; better axial rigidity but lower moment resistance. Pumps, compressors. Tandem (DT) Same direction; shares axial load for extreme thrust requirements. Turbines, centrifuges. 4. Angular Contact vs. Deep Groove Ball Bearings Feature Angular Contact Bearing Deep Groove Bearing Load Capacity Radial + Axial (unidirectional/bidirectional). Primarily radial. Speed High (but lower than deep groove). Higher (lower friction). Precision High (ABEC-5/P4 common). Standard (ABEC-1/3). Mounting Requires preload adjustment (often paired). Simple (single-unit use). 5. Common Applications Machine Tool Spindles (CNC, grinding machines). Automotive Wheel Hubs (combined radial + axial loads). Pumps & Compressors (unidirectional thrust). Robotic Arms (precision motion control). 6. Key Selection Parameters Contact Angle (15° / 25° / 40°). Accuracy Class (ABEC-5, P4, etc.). Preload (Light/Medium/Heavy). Material (Steel, hybrid ceramic).

1. Four-point contact ball bearings are a type of radial single-row angular contact ball bearings. The raceways are designed to support axial loads in two directions. Four-point contact ball bearings can withstand radial loads up to a fraction of the axial load. Compared with double-row bearings, four-point contact ball bearings occupy significantly less axial space.The contact angle of the SKF four-point contact ball bearing designed by QJ is 35° or 45°. The inner ring is a split inner ring. This allows a larger number of balls to be loaded into the bearing, which can give the bearing a higher load-bearing capacity. This SKF four-point contact ball bearing is a split design, that is, the outer ring with the ball and cage assembly can be installed separately with the two inner ring half rings. 2. The inner ring (or outer ring) of the four-point contact ball bearing is precisely assembled from two half rings, and the curvature radius of the groove of its overall periphery (or inner ring) is very small, so that the steel ball and the inner and outer rings are in contact at four "points", which not only increases the radial load capacity, but also can withstand large axial loads in two directions with a compact size, and has a good axial limit capacity in two directions. This is because its axial clearance is relatively small, and its contact angle (generally 35°) is relatively large. 3. The allowable speed of the four-point contact ball bearing is also very high, and it runs very smoothly. Its two half rings can be removed from the whole set of bearings and installed separately, so the four-point contact ball bearing is mostly used in the engine because it can withstand large radial and axial loads at higher speeds.The two inner rings of the half of the SKF Explorer four-point contact ball bearing have deep-bottomed shoulders (fig). When this four-point contact ball bearing is used with SKF cylindrical roller bearings, the oil flow rate is increased. In addition, these deep recesses can be used to secure the puller when disassembling the four-point contact ball bearing. Contact:19957426729(WhatsApp)     bugao@bgbearing.com(Email)

1 Bearings with different load capacities have different load limits, which refers to the maximum weight they can withstand. When purchasing bearings, the first thing to consider is how much pressure the equipment will generate during operation. If the selected bearing has a load capacity lower than the actual demand, it will cause premature wear or even rupture. 2 The speed of the bearing is another important factor that must be considered. Different types of bearings have their own maximum speeds. Exceeding this speed may cause increased friction, temperature rise, and even equipment failure. If your equipment runs at a high speed, then make sure that the selected bearing can cope with this speed requirement. 3 Temperature adaptability. Many equipment will generate heat during operation, and the materials and lubricants of bearings have different adaptability to temperature. Too high or too low temperatures may affect the performance and life of the bearing. When selecting, make sure that the bearing can operate stably within your operating temperature range. 4 Accuracy requirements For some precision instruments and equipment, the accuracy requirements of the bearings are very high. In this case, it is necessary to select high-precision bearings, otherwise it will affect the accuracy of the equipment, and thus affect production efficiency and product quality. 5. Material and environmental adaptability. Bearings are made of a variety of materials, including steel, stainless steel, ceramics, etc. According to the working environment of your equipment, such as whether there is humidity, whether there are corrosive substances, and whether it is exposed to a strong magnetic field, choosing a bearing that is suitable for the material is also a key step. In summary, bearing selection is a process that requires multi-faceted considerations and cannot be determined by only one or two indicators. Load capacity, speed, temperature adaptability, precision requirements, and environmental adaptability are all important factors that you need to consider comprehensively when purchasing bearings. Remember, only by choosing the right bearing can your equipment perform robustly and reliably under various operating conditions. Contact:19957426729(WhatsApp)     bugao@bgbearing.com(Email)

Bearings are an indispensable part of mechanical equipment, and their accuracy directly affects the performance and life of the machinery. Bearings of different accuracy are suitable for different use environments, and choosing the right bearing is crucial to ensure the efficiency of equipment operation. Low-precision bearings are usually used in occasions where speed and accuracy are not required, such as agricultural machinery, construction machinery, etc. These bearings are low-cost, simple to maintain, and can meet basic operating needs. However, in applications with high-speed rotation or high-precision positioning, low-precision bearings are not competent. Medium-precision bearings are mostly used in general industrial fields such as household appliances and office equipment. These bearings can provide stable performance under medium loads while maintaining a reasonable cost. They are suitable for applications that do not require extreme accuracy but require certain reliability and durability. High-precision bearings are widely used in precision instruments, aerospace, high-speed machine tools and other fields. These bearings have extremely high dimensional accuracy and shape accuracy, which can ensure the stability and accuracy of the machinery when it is running at high speed. Although high-precision bearings are expensive, the performance improvement and long-term benefits they bring are often worth the investment. Ultra-high precision bearings are mainly used in scientific research equipment and high-end manufacturing industries, such as astronomical telescopes and semiconductor manufacturing equipment. This type of bearing not only requires extremely high precision, but also must have excellent wear resistance and long life to adapt to extreme working conditions and environments. When selecting bearings, the needs of the use environment should be fully considered, including load size, speed requirements, temperature changes, lubrication conditions and other factors. The right choice can extend the service life of the equipment, improve production efficiency and reduce maintenance costs. Contact:19957426729(WhatsApp)     bugao@bgbearing.com(Email)

The bearings frequently make abnormal noises, but after disassembling the motor, the bearings look "flawless", but cement dust accumulates on the bearing seal lip, and the grease has already hardened into a block. What kind of neglected precision logic is hidden behind this?Mr. Wang of a power tool factory in Henan Province has been having a headache recently. The impact wrenches they produce have to replace the bearings every three months on average on the construction site, which has led to a surge in customer complaints. Mr. Wang found us after being introduced. After communication, Mr. Wang sent the damaged bearings. When we disassembled the bearings, we found that cement dust accumulated on the bearing seal lip, and the grease had already hardened into a block. It's like running in a sandstorm while wearing a gauze mask, which can't block the tiny concrete particles at all. The problem was found, and the technicians of Kenda Bearing customized a special bearing for Mr. Wang. Not only did they change the sealing structure of the bearing, but they also replaced the more suitable bearing grease. The first batch of 200 impact wrenches replaced with our customized bearing installations, after 8 months of actual use on the construction site, 92% of the equipment still operated normally. Mr. Wang said: "This year, we can save more than 400,000 yuan in after-sales labor costs. I will choose Kenda bearings in the future." Contact:19957426729(WhatsApp)     bugao@bgbearing.com(Email)

    Bearings, as the "heart" of mechanical equipment, directly determine the performance and lifespan of the entire system. Lubricating oil is a critical factor in ensuring their normal operation. But why must we use a measured quantity of lubricant? This involves a complex science!     Firstly, the primary role of lubricating oil is to reduce friction and wear, lower energy consumption, and extend bearing life. However, more lubricant does not equate to better performance. Insufficient lubrication increases friction, raises temperatures, and accelerates bearing damage. Conversely, excessive lubrication not only wastes resources but may also cause seal failure and system contamination. Therefore, precision lubrication is key to ensuring efficient bearing operation.     At this point, some might ask: "How do we determine the optimal quantity?" This truly requires expertise. Generally, factors like bearing type, operating environment, rotational speed, and load conditions must be considere. For instance, Kent's production lines are equipped with ‌automated precision lubrication systems‌ that adjust oil delivery in real-time based on preset parameters and monitored data. Notably, Kent's open-type motor bearings (non-grease-containing) are pre-lubricated with double-sided grease during manufacturing, eliminating the need for additional maintenance during use. This approach minimizes human error and avoids issues caused by improper lubrication.     Some may believe "it's safer to add extra lubricant." However, over-lubrication increases bearing temperatures, disrupts seals, and may trigger lubrication system failures—leading to costly downtime and repairs. Proper lubrication not only extends bearing lifespan but also enhances overall equipment efficiency and reliability.          ‌    Ningbo Kent Bearings‌ is a company dedicated to the research, development, and manufacturing of high-precision, low-noise ball bearings, with extensive experience in bearing production and sales. Our products are widely used in motors, automotive systems, household appliances, power tools, and other fields. Upholding our philosophy of ‌"Authentic Quality for Lasting Performance, Quieter Rotation for Your Machinery,"‌ we have earned widespread acclaim from our customers. If you have any needs, please feel free to contact us. (Part of the data in this text is sourced from publicly available information for educational and informational purposes. Should any issues arise, please promptly contact us for removal.)

"The quality of your bearings is unstable!" When Mr. Hu, a technical service engineer of our company, received a call from Mr. Zhang, the purchasing manager of a motor factory, he felt a little uneasy.The ZV3 grade motor bearings that the customer had just accepted three weeks ago had abnormal noise problems after batch delivery. Mr. Hu rushed to the customer's factory with testing equipment that day. After a series of inspections, Mr. Hu found that the clearance between the motor bearing and the motor housing was obviously abnormal.It turned out that the customer felt that the bearing installation was laborious during the trial production, so he enlarged the inner diameter of the motor housing a little. It was this change that caused the radial clearance of the motor bearing to be too large during operation, and the collision between the steel ball and the raceway produced abnormal noise. "It's like walking in shoes that are two sizes larger. The bearings "dangle" in the loose housing, and the life span is shortened by at least 60%." Mr. Hu explained while measuring the deformed housing with a vernier caliper.In the end, we not only reworked 2,000 sets of motor bearings for free, but also assisted in adjusting the parameters of the later bearings. Now the unqualified rate of the motor has dropped from 23% to 0.5%. Kent Bearing reminds all motor manufacturers: seemingly simple size matching is the result of precise calculation of more than 20 parameters such as material thermal expansion coefficient and assembly stress distribution. Choosing a professional bearing manufacturer can save time and effort, reduce costs and increase efficiency. Kent Bearing always practices the concept of "technical pre-service" and provides customers with value-added services such as matching tolerance calculation and installation guidance for free. You only need to make a phone call +86 19957426729 (Whatsapp), and we will escort your product upgrade throughout the process.

Deep groove ball bearings consist of an inner ring, an outer ring, rolling elements (steel balls) and a cage, with a simple and compact structure. Its working principle is based on the physical property that rolling friction is much smaller than sliding friction. The friction resistance is reduced by rolling the steel balls between the inner and outer rings to achieve efficient transmission.In reducers, deep groove ball bearings play a key role. As an important transmission component connecting the prime mover with the working machine or actuator, the reducer needs to accurately match the speed and transmit torque. Deep groove ball bearings ensure the smooth operation of various components inside the reducer with their excellent load-bearing capacity and high-speed rotation ability.                                                   The application of deep groove ball bearings in reducers brings many advantages. It significantly reduces internal friction, improves transmission efficiency, and makes the reducer more energy-saving and efficient. At the same time, its good radial and axial load-bearing capacity enables the reducer to withstand greater loads and enhances the stability and reliability of the equipment.                                                   In addition, the installation and maintenance of deep groove ball bearings are relatively simple, which reduces the maintenance cost and downtime of the equipment. However, the application of deep groove ball bearings in reducers also faces some challenges. For example, under high load or extreme working conditions, the bearing may be subjected to a large impact force, which will affect its service life. Therefore, when selecting bearings, it is necessary to make reasonable selections according to specific working conditions and load requirements. In general, deep groove ball bearings have been widely used in the field of reducers due to their simple structure, strong load-bearing capacity, and high speed. With the continuous advancement of technology and the improvement of manufacturing processes, deep groove ball bearings will play a more important role in reducers, providing strong guarantees for the efficient and stable operation of mechanical equipment. Contact:19957426729(WhatsApp)     bugao@bgbearing.com(Email)

Kent Bearings once provided ZV3 grade sample bearings to a company that focuses on the development of robot motors. The company found that the efficiency of its new motors could not meet the design standards during the test process. It was suspected that there was a problem with the deep groove ball bearing at the front end of the motor, so it was fed back to us. Through precision instrument testing, we found that the friction resistance of the motor bearing was too large, which led to increased motor energy consumption. After in-depth analysis of the reasons, it turned out that the manufacturer did not fully consider the working conditions of the motor's high-speed operation when selecting the bearing, resulting in insufficient lubrication performance of the deep groove ball bearings we provided, and unreasonable sealing structure, resulting in rapid loss of grease, and the bearing was in a dry friction state. At the same time, the manufacturing accuracy of the bearing could not meet the rotation requirements of the motor at high speed. We customized a ZV4 grade deep groove ball bearing with a special lubrication coating and an efficient sealing structure, and optimized the clearance between the bearing and the shaft. After the transformation, the motor efficiency increased by 8%. Kent Bearing specializes in producing high-quality, high-precision deep groove ball bearings. The products have the characteristics of long life, high precision and low noise. They are widely used in motors, household appliances, power tools, garden tools, fitness equipment, water pumps, mechanical equipment and other fields. Kenda Bearing Co., Ltd. is willing to work with you to create greater glory! Contact:19957426729(WhatsApp)     bugao@bgbearing.com(Email)

Ⅰ. Preparation before installationCheck the bearings and accessoriesConfirm that the bearing model and size match the equipment.Check whether the bearing seat, seal ring, and fasteners are intact and free of damage or rust. Clean the bearing seat hole and shaft surface to remove burrs, oil stains or impurities.Lubrication: Spherical bearings are usually pre-installed with grease (such as lithium-based grease). If refilling is required, add according to the instructions (generally fill 1/3~1/2 of the internal space of the bearing).Tool preparation: rubber hammer/soft copper hammer, hydraulic press (if press-fitting is required), torque wrench, heating equipment (for hot fitting). Ⅱ. Installation steps 1. Install the bearing on the shaftCold installation method (common)Align the inner ring of the bearing with the shaft neck, tap the inner ring of the bearing with a hammer (do not directly hit the outer ring or seal, or use a press to apply pressure evenly to ensure that the bearing is pressed into the shaft neck in parallel to the designed position.Hot installation method (when the interference is large)Heat the bearing to 80~100℃ (oil bath or induction heating), quickly insert it into the shaft neck, and tighten it after cooling. 2. Fix the bearingLocking methodTop screw fixing (common): Use an inner hexagon wrench to tighten the top screw on the inner ring of the bearing and press the plane on the shaft (make sure there is a matching plane on the shaft).Eccentric sleeve fixing: Put the eccentric sleeve on the shaft, rotate the eccentric sleeve to lock it, and then fix it with bolts.Fixed sleeve fixing: Adjust the bearing position and lock it with the adapter sleeve and nut. 3. Install the bearing seatInstall the bearing into the bearing seat, making sure the outer spherical surface fits the seat hole.Fix the bearing seat to the equipment base with bolts, tighten the bolts step by step in diagonal order to avoid deflection. 4. Adjustment and sealingClearance check: Manually rotate the bearing to ensure there is no sticking or abnormal sound.Seal confirmation: Check whether the seal is in place to prevent dust or liquid intrusion. Contact:19957426729(WhatsApp)     bugao@bgbearing.com(Email)

A manufacturer of air-conditioning compressor motors had a large number of bearing failures during the warranty period, leading to customer complaints. They came to us, hoping that we could solve their bearing problems. After understanding the specific situation, the home appliance manufacturer sent the faulty motor to us.After disassembling and testing the faulty motor, we found that the inner and outer rings of the deep groove ball bearings were severely worn, the raceway surface was rough and uneven, and the grease inside the bearing had dried up and deteriorated. It was learned that in pursuit of production efficiency, the company improperly installed the bearings during the motor assembly process, resulting in damage to the internal structure of the bearing. At the same time, the selected bearing grease has poor stability in high temperature environments and cannot meet the lubrication needs of the motor for a long time.We provide manufacturers with high-temperature resistant and long-life deep groove ball bearings, equipped with special bearing grease. In addition, we also guide companies to improve the bearing installation process. After the improvement, the average service life of motor bearings has doubled, and the company's after-sales department reported that the number of customer complaints has been greatly reduced, affirming our professionalism.KENTBEARING Kenda Bearing is a company focusing on the research and manufacture of high-precision, low-noise ball bearings. We provide products for many industries and are long-term partners of our customers. Currently, Kenda bearings are widely used in motors, household appliances, power tools, garden tools, fitness equipment, water pumps, mechanical equipment and other fields. If you have any bearing problems, Ningbo will contact Kenda. Contact:19957426729(WhatsApp)     bugao@bgbearing.com(Email)