China Professional Single Row Cylindrical Roller Bearings/Rnu 202 Ecp/Agricultural Bearing/Motorcycle Bearing/Wheel Hub Bearing bearing example

Product Description

Product Description

Details Introduction


RNU 2206 ECP is a NU type single row cylindrical rolling bearing without an inner ring, consisting of an outer ring component with rollers and cages, typically used in applications where the shaft surface has hardened and ground raceways. When there is no inner ring, a larger shaft diameter can be used to improve the strength and stiffness of the shaft. The bearing allows bidirectional axial displacement, which is only limited by the width of the raceway on the shaft. It has the following characteristics:

1. Structure: The NU type bearing consists of a set of cylindrical rollers and 2 shoulderless inner and outer rings.

2. Load bearing capacity: NU type bearings have high axial load bearing capacity and can also withstand bidirectional axial displacement to a limited extent.

3. Application scope: Suitable for applications that require high axial stiffness and small space limitations, such as mechanical transmission systems with high rotational speeds, motors, conveyor belts, and other equipment.

4. Installation and adjustment: During installation, it is necessary to ensure good axial positioning and pay attention to correct lubrication.

5. Detachable structure: NU type bearings usually have a detachable design for easy installation, maintenance, and replacement.

The following is the basic information of the product:

1. Bearing model: RNU 2206 ECP

2. Inner diameter:37.5 mills

3. Outer diameter:  62 mills

4. Width:  20 millimeters

5. Dynamic load rating:  55 kN

6. Static load rating: 49 kN

7. Reference speed: 13000rpm

8. Maximum speed:  14000 rpm

Model Basic Dimensions   (mm) Basic Dynamic load rating  (kn) Rated Speed     ( r/min)
  Inner Diameter Outer Diameter Width Trends static state Reference speed Limiting Speeds
RNU 202 ECP 19.3 35 11 12.5 10.2 22 000 26 000
RNU 203 ECP 22.1 40 12 20 14.3 19 000 22 000
RNU 2203 ECP 22.1 40 16 27.5 21.6 19 000 22 000
RNU 204 ECP 26.5 47 14 28.5 22 17 000 19 000
RNU 2304 ECP 27.5 52 21 47.5 38 15 000 18 000
RNU 205 ECP 31.5 52 15 32.5 27 15 000 16 000
RNU 2205 ECP 31.5 52 18 39 34 14 000 16 000
RNU 206 ECP 37.5 62 16 44 36.5 13 000 14 000
RNU 2206 ECP 37.5 62 20 55 49 13 000 14 000
RNU 1007 ECP 42 62 14 41.5 38 11 000 13 000
RNU 207 ECP 44 72 17 56 48 11 000 12 000
RNU 2207 ECP 44 72 23 69.5 63 11 000 12 000
RNU 307 ECP 46.2 80 21 75 63 9 500 11 000
RNU 208 ECP 49.5 80 18 62 53 9 500 11 000
RNU 2208 ECP 49.5 80 23 81.5 75 9 500 11 000
RNU 308 ECP 52 90 23 93 78 8 000 9 500
RNU 1009 ECP 52.5 75 16 52 52 9 000 11 000
RNU 209 ECP 54.5 85 19 69.5 64 9 000 9 500
RNU 2209 ECP 54.5 85 23 85 81.5 9 000 9 500
RNU 1571 ECP 57.5 80 16 53 56 8 000 9 500
RNU 309 ECP 58.5 100 25 112 100 7 500 8 500
RNU 2210 ECP 59.5 90 23 90 88 8 500 9 000
RNU 310 ECP 65 110 27 127 112 6 700 8 000
RNU 211 ECP 66 100 21 96.5 95 7 500 8 000
RNU 2211 ECP 66 100 25 114 118 7 500 8 000
RNU 212 ECP 72 110 22 108 102 6 700 7 500
RNU 2212 ECP 72 110 28 146 153 6 700 7 500
RNU 1014 ML 80 110 20 64 67 6 000 11 000
RNU 216 ECP 95.3 140 26 160 166 5 300 5 600
RNU 2217 ECP 100.5 150 36 250 280 4 800 5 300
RNU 220 ECP 119 180 34 285 305 4 000 4 500
RNU 2319 ECML 121.5 200 67 530 585 3 600 6 300
RNU 1571 ML 135 180 28 153 183 3 600 6 300
RNU 1030 ML 169.5 225 35 228 290 2 800 5 000
RNU 236 ECML 217 320 52 720 850 2 200 3 600


1.What is the minimum order quantity for this product?
Can be negotiated, we will try our best to meet customer needs.Our company is mainly based on wholesale sales, most customers’orders are more than Over 200 sets.

2.What is your latest delivery time?
Most orders will be shipped within 3-5 days of payment being received.

3.Does your company have quality assurance?
Yes, for 1 years.

4.Are you a factory or a trading company?
We have our own cooperative factory, and our business type is a combination of manufacturing and trading.

5.What is the competitiveness of your company’s products compared to other companies?
High precision, high speed, low noise.

6.What are the advantages of your company’s services compared to other companies?
Answer questions online 24 hours a day, reply in a timely manner,  100% after-sales service.

7.Which payment method does your company support?Do our best to meet customer needs, Can be negotiated.8.How to contact us quickly?Please send us an inquiry or message and leave your other contact information, we will contact you as soon as possible and provide the detailed information you need.

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Rolling Body: Roller Bearings
The Number of Rows: Single
Material: Bearing Steel


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Currency: US$
Return&refunds: You can apply for a refund up to 30 days after receipt of the products.

roller bearing

Are there specific considerations for choosing roller bearings in applications with varying loads or operating conditions?

When selecting roller bearings for applications with varying loads or operating conditions, there are several specific considerations to keep in mind. These factors ensure that the chosen bearings can effectively handle the dynamic nature of the loads and operate reliably under changing environmental conditions. Here’s a detailed explanation of the considerations for choosing roller bearings in such applications:

  • Load Capacity and Rating:

One of the primary considerations is to ensure that the roller bearings have adequate load capacity to handle the varying loads. The load capacity of a bearing is determined by its size, design, and material composition. It is crucial to analyze the expected maximum and minimum loads, as well as any transient or shock loads that may occur during operation. Manufacturers provide load ratings for their bearings, specifying the maximum loads they can withstand under ideal conditions. By comparing the application’s load requirements with the bearing’s load rating, one can determine if the bearing is suitable for the varying load conditions.

  • Dynamic Load Rating:

The dynamic load rating of a roller bearing indicates the maximum load that the bearing can sustain for a specified number of revolutions, without experiencing excessive fatigue or wear. In applications with varying loads, it is essential to consider the dynamic load rating as the loads change. The bearing should be able to handle the highest expected dynamic loads without premature failure. If the loads exceed the bearing’s dynamic load rating, it may lead to accelerated wear, deformation, or complete failure of the bearing.

  • Static Load Rating:

In addition to the dynamic load rating, the static load rating of the roller bearing is also important. The static load rating indicates the maximum load that the bearing can sustain without permanent deformation when the bearing is stationary or rotating at very low speeds. Even in applications with varying loads, there may be periods when the bearing experiences static or slowly changing loads. It is crucial to ensure that the bearing’s static load rating is sufficient to support these loads without causing plastic deformation or loss of dimensional stability.

  • Operating Temperature:

The operating temperature of the application is another important consideration. Roller bearings may be exposed to varying temperatures due to ambient conditions or the heat generated during operation. It is crucial to choose bearings that can withstand the expected temperature range without degradation of their performance or premature failure. High-temperature applications may require bearings with heat-resistant materials or special lubricants, while low-temperature applications may require bearings with improved low-temperature toughness and lubrication characteristics.

  • Lubrication:

Lubrication plays a critical role in the performance and durability of roller bearings, especially in applications with varying loads or operating conditions. Adequate and appropriate lubrication helps reduce friction, dissipate heat, and prevent wear and corrosion. In applications with varying loads, it is essential to ensure that the chosen bearing can maintain proper lubrication under all load conditions. Considerations should be given to the lubrication type, viscosity, replenishment intervals, and compatibility with the operating conditions.

  • Sealing and Contamination:

In applications with varying loads or operating conditions, the ingress of contaminants, such as dust, dirt, or moisture, can pose a significant challenge to the performance and longevity of roller bearings. Proper sealing or shielding arrangements should be considered to protect the bearings from contamination. Depending on the severity of the environmental conditions, different types of seals or shields, as mentioned in the previous answer, may be required to ensure the desired level of protection.

  • Mounting and Alignment:

Proper mounting and alignment of roller bearings are crucial for their optimal performance and longevity. In applications with varying loads, it is important to ensure that the bearings are mounted correctly and aligned accurately to accommodate the changing loads and prevent excessive stresses. Improper mounting or misalignment can lead to increased friction, uneven load distribution, premature wear, and reduced bearing life. Following the manufacturer’s instructions and using appropriate mounting techniques are essential for ensuring reliable operation under varying load conditions.

In summary, when choosing roller bearings for applications with varying loads or operating conditions, specific considerations include load capacity and rating, dynamic and static load ratings, operating temperature, lubrication requirements, sealing against contamination, and proper mounting and alignment. By carefully considering these factors, engineers can select roller bearings that can reliably handle the varying loads and operate effectively under changing environmental conditions, ensuring optimal performance and durability of the bearings.roller bearing

Can roller bearings be customized or modified for unique industrial needs?

Yes, roller bearings can be customized or modified to meet unique industrial needs. Manufacturers understand that different industries and applications may have specific requirements that cannot be fulfilled by standard off-the-shelf bearings. Customization or modification of roller bearings allows for tailored solutions that address the unique challenges and demands of specific industrial applications. Here’s a detailed explanation of how roller bearings can be customized or modified:

  • Size and Configuration:

Roller bearings can be customized in terms of size and configuration to fit specific dimensional requirements. Different industries may have limitations in terms of available space or require bearings to fit into existing designs. Manufacturers can provide custom bearing sizes, shapes, or configurations to meet these specific needs. This can include variations in the number and arrangement of roller elements, cage designs, or outer ring profiles to optimize the bearing’s performance and compatibility with the application.

  • Load Capacity:

For applications with unique or heavy load requirements, roller bearings can be customized to enhance their load-carrying capacity. This can involve using different materials for the bearing components, optimizing the design geometry, or incorporating additional features such as larger rolling elements or modified cage designs. By customizing the bearing’s load capacity, it becomes better suited to withstand the specific forces and loads encountered in the industrial application.

  • High-Speed Performance:

In industries that require high-speed machinery or equipment, roller bearings can be customized to improve their performance at elevated speeds. High-speed applications often involve challenges such as increased temperature, centrifugal forces, or vibration. Customization can involve selecting specialized materials with improved heat resistance, optimizing the bearing’s internal geometry for reduced friction or better lubricant flow, or incorporating advanced cage designs that minimize cage wear and maintain stability at high speeds.

  • Specialized Materials and Coatings:

Roller bearings can be customized by using specialized materials or coatings to enhance their performance in specific environments. For example, industries with corrosive or high-temperature conditions may require bearings made from stainless steel or equipped with corrosion-resistant coatings. Additionally, specialized coatings such as ceramic or diamond-like carbon (DLC) coatings can be applied to reduce friction, improve wear resistance, or enhance the bearing’s overall performance in demanding applications.

  • Sealing and Lubrication:

Customization of roller bearings can involve designing and incorporating specific sealing mechanisms or lubrication systems tailored to the application’s requirements. This ensures effective protection against contaminants, such as dust, moisture, or debris, and allows for optimized lubrication to enhance the bearing’s performance and longevity. Custom sealing arrangements, such as labyrinth seals or triple-lip seals, can be implemented to provide higher levels of protection in challenging environments.

  • Integrated Sensors or Monitoring Systems:

In certain industries, there is a need for real-time monitoring of bearing performance or condition. Roller bearings can be customized with integrated sensors or monitoring systems to provide data on parameters such as temperature, vibration, or lubricant condition. These customizations allow for proactive maintenance, early fault detection, and overall system optimization by providing valuable insights into the bearing’s health and performance.

It is important to note that customization or modification of roller bearings typically involves collaboration between the bearing manufacturer, application engineers, and end-users. Through this collaborative process, the specific requirements and challenges of the industrial application can be understood, and the necessary modifications or customizations can be implemented to ensure optimal performance and reliability.

roller bearing

What are roller bearings, and how are they used in various mechanical applications?

Roller bearings are mechanical components designed to facilitate smooth and efficient rolling motion between two surfaces. They consist of cylindrical or tapered rollers placed between inner and outer raceways, which are typically in the form of rings or tracks. Roller bearings are widely used in various mechanical applications where there is a need to support radial or axial loads and reduce friction. Here’s a detailed explanation of roller bearings and their diverse applications:

Types of Roller Bearings:

There are several types of roller bearings, each designed to accommodate specific load types and operating conditions:

  • Cylindrical Roller Bearings: These bearings feature cylindrical rollers that distribute loads evenly over a larger surface area. They are suitable for high radial loads and moderate axial loads and often used in applications such as electric motors, gearboxes, pumps, and machine tools.
  • Tapered Roller Bearings: Tapered roller bearings consist of tapered rollers and raceways that are angled to handle both radial and axial loads. They are commonly used in automotive applications, such as wheel bearings, transmissions, and differential gears, as well as in heavy machinery and equipment.
  • Spherical Roller Bearings: Spherical roller bearings have barrel-shaped rollers that align themselves with the outer raceway, allowing them to accommodate misalignment and shaft deflection. They are commonly used in applications with high radial loads and moderate axial loads, such as conveyor systems, mining equipment, and vibrating screens.
  • Needle Roller Bearings: Needle roller bearings have long, thin rollers with a high length-to-diameter ratio. They are designed to handle high radial loads in limited spaces and are commonly used in applications such as automotive transmissions, industrial gearboxes, and small appliances.
  • Thrust Roller Bearings: Thrust roller bearings are designed to handle axial loads and provide high thrust capacity in one direction. They consist of cylindrical or tapered rollers arranged in a cage and are used in applications such as automotive transmissions, crane hooks, and large-scale machinery.

Applications of Roller Bearings:

Roller bearings find extensive use in a wide range of mechanical applications due to their ability to support heavy loads, reduce friction, and provide smooth rotational motion. Some notable applications include:

  • Automotive Industry: Roller bearings are widely used in automotive applications, including wheel bearings, transmissions, differentials, and engines. They provide support for radial and axial loads, enable smooth rotation, and contribute to overall vehicle performance and reliability.
  • Industrial Machinery: Roller bearings are essential components in various industrial machinery and equipment. They are used in gearboxes, electric motors, pumps, conveyors, printing presses, and machine tools, among others. Roller bearings provide reliable and efficient operation, reducing friction and enabling high-speed and heavy-load capabilities.
  • Aerospace and Aviation: Roller bearings are critical in aerospace and aviation applications, where they are used in aircraft engines, landing gear systems, control surfaces, and helicopter rotor systems. They must meet stringent performance and reliability requirements in extreme operating conditions.
  • Construction and Mining: Roller bearings are employed in construction and mining equipment, such as excavators, bulldozers, cranes, and rock crushers. They provide robust support for heavy loads, withstand harsh environments, and contribute to the durability and performance of these machines.
  • Energy and Power Generation: Roller bearings are used in power generation equipment, including turbines, generators, and wind turbines. They enable smooth rotation, handle high loads, and contribute to the efficiency and reliability of energy production systems.
  • Railways and Transportation: Roller bearings play a crucial role in railway applications, including locomotives, passenger cars, and freight wagons. They provide support for wheels, axles, and suspension systems, ensuring safe and reliable operation under dynamic loads and varying operating conditions.
  • Medical Equipment: Roller bearings are used in various medical equipment, such as MRI machines, X-ray scanners, and surgical instruments. They provide precise and smooth motion in critical applications, contributing to the accuracy and reliability of medical procedures.

These are just a few examples of the extensive use of roller bearings in various mechanical applications. The versatility, load-carrying capacity, and efficiency of roller bearings make them essential components in numerous industries, where they contribute to the performance, durability, and reliability of machinery and equipment.

China Professional Single Row Cylindrical Roller Bearings/Rnu 202 Ecp/Agricultural Bearing/Motorcycle Bearing/Wheel Hub Bearing   bearing exampleChina Professional Single Row Cylindrical Roller Bearings/Rnu 202 Ecp/Agricultural Bearing/Motorcycle Bearing/Wheel Hub Bearing   bearing example
editor by CX 2024-04-11

Roller Bearing

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