The internal structure of cylindrical roller bearings adopts the roller to be arranged in parallel, and the spacer retainer or isolation block is installed between the rollers, which can prevent the inclination of the rollers or the friction between the rollers, and effectively prevent the increase of rotating torque.The raceway and rolling body of cylindrical roller bearing have geometric shapes. After the improved design, the bearing capacity is higher. The new structure design of the roller end face and the roller end face not only improves the axial bearing capacity of the bearing, but also improves the lubrication condition of the roller end face and the contact area of the roller end face and the roller end face.
A cylindrical roller bearing is a type of rolling-element bearing that uses cylindrical rollers to reduce friction between the parts of the bearing. The rollers are arranged in a circular pattern, and the outer race, which houses the rollers, is typically made of steel. The inner race is usually made of brass or bronze.Cylindrical roller bearings are typically used in applications that require high radial loads, such as conveyor systems, pumps, and compressors. They are also used in applications that require high axial loads, such as machine tools and printing presses.
Advantages of Cylindrical Roller Bearings
High Load Carrying Capacity
The outstanding load-carrying capacity of cylindrical roller bearings is their unique main feature. Due to the cylindrical shape of the rollers and their arrangement parallel to the axis of rotation, the surface area in contact with the raceways is larger. Due to this design feature, cylindrical roller bearings can distribute radial loads more evenly, making them ideal for heavy-load applications.
Versatility For High-speed Applications
Cylindrical roller bearings also offer significant advantages for high-speed applications. The design of these bearings includes cylindrical rollers, which provide a smooth rolling action that reduces friction compared to ball bearings. Due to reduced friction, cylindrical roller bearings excel in applications where high speed is critical, such as industrial machinery and automotive transmissions.
Compact Design
Due to their smaller shape, cylindrical roller bearings are an attractive option for applications where space is limited. The cylindrical shape of the rollers is parallel to the axis, allowing for more efficient use of space compared to other bearing types. This compactness allows engineers to more easily integrate these bearings into systems with limited space and simplifies the overall design of machinery.
Generates Minimal Heat And Friction
Efficiency is a key factor in machine design and operation, and cylindrical roller bearings help achieve this efficiency by generating less heat and friction. The rolling action of cylindrical rollers and proper lubrication provide less friction than plain or other bearings. The reduction in friction reduces heat generation while saving energy.
Customization For Specific Applications
Cylindrical roller bearings are available in a variety of types and combinations to meet the unique needs of various applications. This customization capability enables engineers and manufacturers to select the best solution based on parameters such as load capacity, speed and space constraints. There are many types of bearings, such as single row, double row and full complement, so there is always a bearing that is best suited for each specific application.
High Quality
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At our manufacturing facilities, we provide a complete package that includes everything required to get you started, including training, installation and support.
Competitive Price
We offering a higher-quality product or service at an equivalent price. As a result we have a growing and loyal customer base.
N Type and NU Type
There is no flange on the outer ring of N type bearing, and there is flange on both sides of the inner ring, which allows the displacement of the shaft relative to the bearing pedestal in both axial directions. There is a flange on each side of the outer ring of NU type bearing, but there is no flange on the inner ring, which also allows the displacement of the shaft relative to the bearing pedestal in both axial directions. Therefore, this kind of structure is suitable to be used as a travelling end bearing.
NJ Type and NF Type
There are flanges on both sides of the outer ring of NJ type bearing and on the one side of the inner ring, which makes the NJ type bearing withstand a certain amount of unidirectional axial load. There are flanges on one side of the outer ring of NF type bearing and on both sides of the inner ring, so that the NF type bearing can also withstand a certain amount of unidirectional axial load. Therefore, this kind of structure is suitable to be used as an unidirectional axial positioning bearing.
NUP Type
There are flanges on both sides of the outer ring of NUP type bearing and a fixed single flange on one side of the inner ring, while the other side is a separable loose rib, which makes the NUP type bearing withstand a certain amount of bidirectional axial load. One side of the NFP bearing outer ring is provided with a (fixed) single flange, while the other side is a separable loose rib and the inner ring is provided with flanges on both sides, so that it can withstand a certain amount of bidirectional axial load. This kind of bearing structure can limit the displacement of the shaft relative to the bearing pedestal in two axial directions. Therefore, it is suitable to be used as a fixed end bearing.
NN Type
There are flanges on both sides of the inner ring and in the middle of NN type bearing, but no flange on the outer ring, which allows the displacement of the shaft relative to the bearing pedestal in both axial directions.
NNU Type
There are flanges on both sides of the outer ring and in the middle of NNU type bearing, but no flange on the inner ring, which allows the displacement of the shaft relative to the bearing pedestal in both axial directions. Therefore, this kind of structure is suitable to be used as a travelling end bearing. The cages of this type of bearing mostly adopt vehicle solid cages.
01
Axial Displacement
Bearings are designed to support axial loads and facilitate axial movement within a machine. N and NU types of cylindrical roller bearings are perfect use cases for axial displacement because single row cylindrical roller bearings provide a range of axial displacement relative to the bearing housing within certain limits.
02
Withstand Accidental Thrust Loads
Thrust loads are loads applied parallel to the rotation of the shaft. Cylindrical roller bearings of the NF, NJ and NUP series are designed in such a way that they can withstand incidental thrust loads in addition to radial loads.
03
For Use In Heavy Machinery And Extreme Systems
Cylindrical roller bearings are used in high-speed systems and can be deployed in high-performance systems such as agricultural machinery, wind turbines, and mining machinery.
Inner Ring
The inner race, also known as the inner ring or cone, is the component connected to the rotating shaft. It serves as the primary load-bearing surface of the bearing and interacts directly with the rollers. The design and geometry of the inner race is critical to bearing performance and must be properly mounted to the shaft to ensure effective load distribution.
Outer Ring
The outer ring, often called the outer ring or cup ring, surrounds the inner ring and provides a fixed mounting surface for the bearing. It is connected to the housing or machine structure. Just the inner ring, the design of the outer ring plays a vital role in the operation of the bearing. It must be securely positioned within the bearing housing.
Roller
Rollers are the load-bearing elements of bearings. These cylindrical, conical, spherical or needle-shaped components transfer applied forces and allow for smooth rotation. Roller design varies depending on bearing type and application. Cylindrical rollers are usually used in cylindrical roller bearings, while tapered rollers are used in tapered roller bearings, etc.
Cage (roller cage)
The cage, also called a roller cage or separator, is a key component in maintaining the spacing and alignment of the rollers within a bearing. It prevents the rollers from coming into direct contact with each other, causing friction and wear. Additionally, the cage helps distribute lubricant evenly within the bearing. Cage materials and designs may vary depending on specific bearing requirements.
Cylindrical roller bearings are commonly made from high-quality steel alloys, such as chrome steel or stainless steel. These materials offer high strength, durability, and resistance to wear and corrosion. Chrome steel is the most commonly used material for cylindrical roller bearings due to its high hardness, toughness, and fatigue resistance. It also has good dimensional stability and can withstand high temperatures and shock loads. Stainless steel is another popular material for cylindrical roller bearings, particularly in applications where corrosion resistance is critical. Other materials, such as ceramic or plastic, may also be used in specialized applications where high temperature or chemical resistance is required. However, these materials are less commonly used due to their higher cost and lower availability.
Regular Maintenance And Inspection
Regular maintenance and inspection are necessary to detect faults early and prevent accidents before they occur. It is suggested that periodic maintenance be done following the procedure specified.
Cleaning
Before dismounting a bearing for inspection, record the physical condition of the bearing, including taking photographs. In general, neutral water-free light oil or kerosene is used to clean bearings, a warm alkali solution can also be used if necessary. In any case, it is essential to keep oil clean by filtering it prior to cleaning. Apply anti-corrosion oil or rust preventive grease on bearings immediately after cleaning.
Inspection And Analysis
Before determining that dismounted bearings will be reused, the accuracy of their dimensions and running, internal clearance, fitting surfaces, raceways, rolling contact surfaces, cages, etc., should be checked.
Proper Handling
Bearings are delicate and can get damaged quickly. As such, it is very important that they are stored horizontally in a clean and dry environment with their packaging intact. Do not expose them to any airborne contaminants, as even a tiny speck of dirt can cause premature failure. Never hammer or pound them, or apply a direct force on them or their outer ring, which can cause damage to the rolling elements, resulting in misalignment.
Lubrication
Proper lubrication is crucial for the prolonged life of roller bearings. The correct lubricant depends on environmental conditions, temperature, speed, and load. In this case, it is advisable to follow the manufacturer’s recommendations.
The working principle of cylindrical roller bearings is based on the principle of rolling contact. The bearing consists of an inner ring, an outer ring, and cylindrical rollers that are arranged between the two rings. The rollers are held in place by a cage or separator, which maintains their position and prevents them from coming into contact with each other.When a load is applied to the bearing, the rollers rotate and roll along the raceways of the inner and outer rings. This rolling motion reduces friction and distributes the load evenly across the bearing, allowing it to support both radial and axial loads.The design of cylindrical roller bearings allows them to handle high radial loads, as well as moderate axial loads. The length of the rollers is typically greater than their diameter, which provides a larger contact area and distributes the load more evenly. The use of a cage or separator also helps to reduce friction and prevent the rollers from skewing or jamming.
Choose a manufacturer that can provide you with the cylindrical roller bearing model you need
Choosing the right cylindrical roller bearing begins with identifying a manufacturer that offers the specific model you require. Different manufacturers offer different types of cylindrical roller bearings, each with its own unique features. When making your selection, it is important to pay attention to various parameters such as load capacity, size and type of bearing.
Compare the prices of various cylindrical roller bearing manufacturers
After identifying a manufacturer that can offer the specific cylindrical roller bearing model you require, the next stage involves price comparison. This step is critical for procurement professionals whose responsibilities include procuring cost-effective components. It gives you a better understanding of the market and helps in getting the best deal.
Compare the delivery times of various cylindrical roller bearing manufacturers
In manufacturing and industrial operations, time often equals money. So once you've identified potential manufacturers and compared their prices, the next logical step is to evaluate their delivery times. This is particularly important in industries where machinery downtime can result in significant financial losses.
After choosing a satisfactory cylindrical roller bearing manufacturer, compare its popularity
Once you have selected a potential cylindrical roller bearing manufacturer based on your specific needs, the next step is to evaluate their reputation and popularity. This can provide insight into their position in the industry and their track record of delivering quality products. Customer reviews and industry publications are valuable resources.
Check the quality of cylindrical roller bearings in person or find a local representative
If feasible, the next step in selecting the appropriate cylindrical roller bearing involves practical application. Consider checking the quality of the bearings yourself. This may mean visiting the manufacturer's production facility, where you can take a closer look at the bearings and perhaps witness their production process firsthand.
After cooperation, consider long-term cooperation based on product quality, actual delivery time, and after-sales service
After establishing a successful initial partnership with a cylindrical roller bearing manufacturer, it is important to evaluate the possibilities for long-term cooperation. Factors to consider here include product quality, actual delivery time, and the quality of after-sales service.
Bearing seat installation
When installing the split bearing bush, bearing housing and bearing cover, the back of the bearing bush and the hole of the bearing housing should be in good contact. If the requirements of the platform are not met, the bearing housing hole should be used as the benchmark. The split surface of the seat is 0.05 ～0.1mm higher.
The contact area between the back of the bearing and the bearing seat
The upper tile should not be less than 40%, the lower tile should not be less than 50%, and the contact area is required to be uniform, and there is no gap between the bottom of the lower tile and both sides. When the bearing bush is subjected to increased pressure,it causes rapid wear. The contact spot between the bearing pad and the bearing seat should be 1 to 2 points / cm².Too little will cause the bearing pad to aggravate the wear, deformation and cracking.
Bearing and journal installation
When installing the bearing, attention must be paid to the contact angle and contact point between the bush and the journal. The center angle corresponding to the contact surface between the bearing pad and the journal is called the contact angle. If this angle is too large, it will affect the formation of the lubricating oil film, destroy the lubricating effect, and cause the bearing pad to wear quickly. abrasion.The general contact angle is 60 to 90 degrees. The contact point between the bush and the journal is related to the equipment load, medium load and continuous operation of 2 to 3 points / cm2, heavy load and high-speed operation of equipment 3 to 4 points / cm2, to make the contact angle and contact spot meet the requirements, It is necessary to conduct scraping research. Scrape the lower tile first, then the upper tile, apply a thin layer of red paint on the journal, place the shaft on the bearing pad, and then remove it after one rotation in each of the forward and reverse directions. Where there are marks is uneven, it should be scraped and repeated many times until the distribution of the marks on the bearing bush is even and meets the requirements.
Pay attention to the adjustment of bearing clearance during installation, which is generally controlled at 1/1000~ 3/1000 of the shaft diameter, which can be optimized according to equipment load, speed, and oil viscosity.
Keeping the bearings and surrounding areas clean
Dirt and dust seriously affect the working of bearings. Hence, even if the dust is not visible to the naked eyes, care should be taken to keep its surrounding areas neat and clean.
Careful handling of the bearings
Bearings failure is very common phenomena. There are varied reasons possible for its failure. Sometimes heavy shocks during handling result in scratches that eventually may cause in permanent damage to the bearings.
Make use of proper tools
It is highly important to make use of proper tools while handling the bearings. By this, it means using tools very specific for bearings and not using general-purpose tools.
Preventing corrosion of bearings
The best way to avoid corrosion is to always wear gloves while handling the bearings. It is highly important to monitor the rust on bearings caused by corrosive gasses.
Installing and replacing requires careful attention to detail to ensure that the bearing is properly installed and functions correctly.
Prepare the bearing
Before installing the bearing, ensure that it is clean and free of any contaminants. Check that the bearing is the correct size and type for the application.
Prepare the shaft and housing
Ensure that the shaft and housing are clean and free of any burrs or damage that could affect the bearing’s performance. Check that the shaft and housing are the correct size and type for the bearing.
Apply lubrication
Apply the correct amount and type of lubricant to the bearing and the shaft or housing.
Install the bearing
Carefully install the bearing onto the shaft or into the housing. Ensure that the bearing is properly aligned and seated.
Secure the bearing
Secure the bearing in place using the appropriate method, such as a locking collar or set screws.
Remove the old bearing
Remove the old bearing from the shaft or housing using the appropriate method, such as a bearing puller or press.
Prepare the shaft and housing
Ensure that the shaft and housing are clean and free of any burrs or damage that could affect the new bearing’s performance. Check that the shaft and housing are the correct size and type for the new bearing.
Prepare the new bearing
Before installing the new bearing, ensure that it is clean and free of any contaminants. Check that the new bearing is the correct size and type for the application.
Apply lubrication
Apply the correct amount and type of lubricant to the new bearing and the shaft or housing.
Install the new bearing
Carefully install the new bearing onto the shaft or into the housing. Ensure that the bearing is properly aligned and seated.
Secure the new bearing
Secure the new bearing in place using the appropriate method, such as a locking collar or set screws.
LUOYANG TEDIN BEARING CO., LTD. --owns core production technology of high-end rolling bearings, focusing on R & D high-end bearings, customized bearings, and specially designed precision bearings have been in a leading position of China.
TEDIN has a variety of automatic producing lines and supporting facilities for high-precision roller bearings. The precision grade of the precision bearings can reach P5, P4, P2. TEDIN serves a wide range of customers especially in precision machine tools, rolling mills, precision rotary tables, industrial robots, high-speed railway, track traffic, military Radar, helicopter gunship, wind power, and solar energy, etc.
