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Ready to ShipLike every other double-row angular contact ball bearing, the double-row angular contact ball bearing 3309 nsk is designed to support both radial and axial loads. It can do this because of its unique construction in the raceway shoulder and the ball. Here is a detailed breakdown of the various types available.
Cardan shaft bearings
These types of bearings are found in a cardan shaft. A cardan shaft is used in vehicles and machines with constant-angle universal joints. The bearings help reduce friction and ensure smooth rotating movements in machinery and vehicles. This helps ensure the Cardan shafts have smooth and reliable power transmission, even under heavy loads and challenging working conditions.
Precision bearings
These bearings are designed to provide very accurate positioning and minimal friction. As a result, they are widely used in applications where precision is critical. Such industries include aerospace, robotics, and medical equipment. In addition, these bearings are manufactured using special materials and processes that help reduce wear and increase the bearing's lifespan.
Wheel hub bearings
Double-row angular-contact ball bearings are found in many wheel hub assemblies in cars, trucks, and other vehicles. This is because they provide smooth wheel rotation and absorb both radial and axial forces acting on the wheel. In addition, their ability to manage significant loads and endure harsh conditions ensures that the bearings contribute to the overall dependability and performance of the vehicle's wheel system.
High-load bearings
Most applications with heavy loads, such as mining and construction machinery, use double-row angular-contact ball bearings. These bearings can endure high radial and axial loads, making them suitable for challenging working environments. In addition, since they are manufactured with robust materials and a unique design, they provide exceptional stability and durability.
Special design bearings
Some applications have unique requirements in which they cannot use standard parts. Such parts can include bearings that must endure high temperatures, have non-standard dimensions, or are made of materials that resist corrosion. In these applications, specially designed double-row angular-contact ball bearings will go in. They can ensure optimal performance in situations that would otherwise compromise standard bearings.
Identifying the potential commercial value of double-row angular-contact ball bearings 3309 nsk can help a business understand how to sell or incorporate them into various uses. Here are some of the key benefits.
Vehicle wheel hubs
Cars, trucks, and other vehicles use double-row angular-contact ball bearings in their wheel hubs. Since these bearings can handle axial and radial loads, they provide smooth wheel rotation while increasing the vehicle's stability and safety. Therefore, every automotive manufacturer should prioritize using quality bearings, as they directly affect the overall performance and longevity of the vehicle.
Industrial machinery
Double-row angular-contact ball bearings are used in diverse industries. These include mining, construction, and heavy manufacturing. These bearings are designed to handle heavy loads, making them ideal for slowing down the rollers and gears of industrial machinery. A smooth operation elongates the machines' lifespan while increasing their reliability and efficiency.
Aerospace applications
Double-row angular-contact ball bearings are used in components like landing gear and actuators in the highly precise field of aerospace engineering. Because precision bearings are essential in this situation, they guarantee aircraft parts' safe and effective operation under extreme conditions. They are also used in satellite systems and guidance devices to ensure accurate positioning and movement.
Medical equipment
Double-row angular contact ball bearings are integral parts of numerous devices in the medical sector. These bearings allow for smooth and precise motions in equipment such as MRI machines and surgical robots. For example, since these procedures must be ultra-precise and reliable, bearing performance directly impacts the accuracy and safety of medical practices.
Robotics
Robotics industries widely use double-row angular-contact ball bearings because they help improve a robot's joints and active components. In addition, their precision and load-carrying capacity make them ideal for applications used in industrial automation, including robotic arms. The quality of the bearings also affects the robot's accuracy, durability, and smooth operation in demanding tasks.
The 3309 double-row angular contact ball bearing is suitable for precision industry applications. It does so by incorporating the inner ring and outer ring of a double-row angular contact ball bearing and a single-row angular contact ball bearing. Here is a breakdown of its key features, specifications, and functionality.
Double-row
The 3309 bearing comprises two rows of balls. Therefore, it can accommodate both radial and axial loads simultaneously at an angle. In addition, this allows the bearing to handle high loads in multiple directions.
Angular contact design
The raceway of the 3309 bearing has a specific curvature that allows it to sustain axial loads. This feature lets the bearing manage the combined radial and axial loads that are typical in many industrial applications.
Sealed or shielded options
The 3309 can be either sealed or shielded, depending on the user's preference. Sealed bearings have rubber seals on both sides that keep in grease and keep out contaminants. On the other hand, shielded bearings have metal shields that perform a similar function but allow more light to pass through. Both variations help improve the bearing's lifespan by reducing wear from environmental factors.
High load capacity
The configuration of two rows of balls enables the 3309 bearing to bear heavy loads. This makes it suitable for heavy machinery and vehicles. In addition, the bearing's ability to manage both radial and axial loads increases its versatility in various applications.
Versatile construction
Most materials used to make the 3309 bearing are high-quality steels with good wear resistance. Some people incorporate its components with rolling elements, such as ceramic balls, for uses requiring non-magnetic properties or higher heat resistance.
Proper installation of the 3309 double-row angular contact ball bearing is key to its performance and longevity. Follow these steps for a successful installation:
Prepare the mounting surface
The first step is to ensure both the shaft and housing where the 3309 bearing will be fitted are clean and free of any defects. Any dirt, debris, or remnants left on the surfaces can cause improper bearing seating. This, in turn, will lead to premature bearing failure. It is also important to inspect both components for damage or wear before proceeding.
Apply lubricant
If the bearing is sealed, the user does not need to do anything as the manufacturer would have pre-filled it with grease. However, if it is shielded, ensure the inside of the bearing is evenly coated with a good-quality grease before proceeding. Lubricant is critical as it reduces friction and wear, helping the bearing operate smoothly.
Install the inner ring
Carefully slide the inner ring of the bearing onto the shaft. Users can lightly heat the inner ring to make the shaft installation easier. Heating the ring expands the metal, allowing it to slide onto the shaft more easily. However, ensure the temperature does not exceed 100 degrees Celsius, as that will compromise the bearing's material integrity. In addition, use a bearing heater or warm it in an oven. Do not use an open flame to heat it. After heating, place a damp cloth on the inner ring to cool it down.
Fit the outer ring into the housing
Using the outer race of the bearing for assistance, ensure the outer ring is properly positioned and secured in the housing bore. The outer ring should be evenly pressed until it is fully seated. Users can use a hydraulic press for precision. Make sure to apply equal pressure on all sides to avoid any damage to the ring.
Install the bearing
Once the inner ring is installed on the shaft and the outer ring is fitted into the housing, carefully bring the shaft into the housing. The inner ring will naturally have balls that are separated by a spacer on it at 90 degrees to the load. This is known as the radial play position of the bearing. Tilt or rotate the shaft so that the balls move to this position. Gently slide the shaft into the outer ring. Ensure the inner ring does not contact the outer ring as the shaft passes through. Once the shaft is inside the outer ring, use a spacer to tightly bring the inner ring into contact with outer ring. Then, use a dial indicator to check the end play. Finally, if the end play is correct, add the specified lubricant to the bearing. However, in sealed bearings, there is no need to add extra lubricant as it is already sealed. If the user encounters any resistance at this point, gently back off the adjustment and recheck alignment.
Final adjustments
Lastly, secure the housing and reassemble any other adjoining components. However, even after installing the bearing, the user must monitor the bearing regularly for signs of abnormal wear or overheating. This will help identify potential issues before they develop into more serious problems.
As stated above, proper maintenance of the angular contact ball bearing ensures prolonged use. Here are some ways to keep the double-row angular-contact ball bearing 3309 in good condition.
Lubrication
Lubrication reduces friction, which is one of the main causes of wear. The 3309 bearing has sealed and shielded varieties. Sealed bearings have seals that prevent the exit of grease and intrusion of contaminants. On the other hand, shielded bearings are exposed to environmental factors. Therefore, it is critical to check the shielded bearing regularly to see if it requires additional lubricant. More importantly, when adding lubricant, ensure that shielded bearings use the same type of lubricant that the manufacturer used. Additionally, be careful not to over-lubricate it, as this will cause more harm than good.
Regular Inspection
Some common symptoms of bearing failure are unusual noises, vibrations, and elevated temperatures. These factors can also help identify potential threats during routine inspection. The key is to inspect the bearings frequently for signs of damage or wear. This includes looking for corrosion, physical damage, or abnormal noises and vibrations. Early detection of these issues will ensure proper intervention before they worsen and cause more serious problems.
Proper Alignment
Misalignment is a common reason for bearing failure because it results in uneven load distribution. To prolong the bearing's life, ensure proper alignment during both installation and use. Users can employ different techniques and tools to guarantee alignment.
Operating conditions
The 3309 bearing is ideal for heavy loads and harsh environments. However, strenuous work conditions can quickly lead a bearing to its death. Therefore, try as much as possible to keep the temperature, load, and speed within the manufacturer's recommended limits. Users should also consider installing the bearing in a way that it has easy access for inspection and maintenance. This will go a long way in ensuring longevity and reliable performance.
A1. In the 3309 nomenclature, “3” refers to the basic series of the bearing and “09” its dimension series, which specifies the bore size. As such, the double-row angular-contact ball bearing 3309 belongs to the SKF standard bearing series.
A2. Manufacturers make 3309 bearings from bearing steel, as it has excellent wear resistance, fatigue strength, and hardness. This is particularly important in high-stress and heavy-load applications. Furthermore, some 3309 bearings for special applications are made from ceramic or stainless steel, which offer advantages like corrosion resistance or non-magnetic properties.
A3. It depends on the environment the bearing will be working in. A shielded bearing is ideal in moderate contamination environments. Similarly, a sealed bearing is more suitable for extremely contaminated environments. Note that shielded bearings offer less effective protection than sealed bearings. However, they generate less heat and are easier to inspect and relubricate.
A4. Yes, they can. In fact, they are designed to handle loads in two axial directions and radial loads. This is particularly useful in applications where both types of load occur simultaneously, such as in automotive wheel hubs and heavy machinery.
A5. Some signs that indicate failure include abnormal noise, heating, and vibrations, as well as visible damage or corrosion during inspection. When one or more of these symptoms present themselves, do not attempt to fix them. Instead, replace the bearing as soon as possible. Failure to do so will only result in compromised machine performance and even more serious damage in the long run.
