Product Description

Factory Price Gas Turbine Bearings Cylindrical Roller Bearing Nu207 Nu209 Nu211 E/M/Etn1

Product Description

Cylindrical Roller bearing is 1 of the rolling bearings, which is widely used in modern machinery.It relies on rolling contact between the main components to support the rotating parts.Roller bearings are now mostly standardized.Roller bearing has the advantages of small torque required for starting, high rotation accuracy and convenient selection.

Product name Cylindrical roller bearing
Material Bearing Steel
Bearing Package Barreled, bagged, boxed, palletized or as customers’ requirement.
Service OEM service provided
Delivery time 3-10 days depends on quantity needed

Less friction and low noise, durable.
Ability to carry heavy loads
Less coefficient of friction.
High limiting speed.
Variations of structure:N,NU,NJ,NF,NUP,NFP,NH,NN,NNU,NNF,FC,FCD.
Physical Characteristics:
Cylindrical roller bearing can be separated by single row,double rows, and 4 rows.
This kind of bearing can be submitted to high radial load and some axial load.
The rolling element of a cylindrical roller bearing is cylinder, the 2 ends of the external lines have the corrective slope which can eliminate the contact stress.
 NN and NNU design cylindrical roller bearing have high rigid and apply to machines such as milling

 diameter         (mm)  Bearing Designation                               Boundary Dimensions       (mm)  Basic Load Ratings        (N)       Limiting Speeds (rpm)  Weight (Kg)
 Current Designation d D B rsmin r1smin Cr Dynamic Cor Static Grease Oil
16 SZ-4101 16 44 8.3     15700 18000     0. 0571 1
17 N203 17 40 12 0.6 0.3 11400 9100 16000 19000 0.07800
NJ203 17 40 12 0.7 0.3 11400 9100 16000 19000 0.06900
NJ203ETN1 17 40 12 0.6 0.6 16900 13800 16000 19000 0. 0571 8
NU203 17 40 12 0.6 0.3 11400 9100 16000 19000 0.07000
NU203ETN1 17 40 12 0.6 0.3 16900 13800 16000 19000 0.06654
NJ2203E 17 40 16 0.6 0.3 22800 20300 13800 16400 0.09200
20 N204 20 47 14 1 0.6 15800 13100 13800 16400 0.13300
NF204 20 47 14 1 0.6 15800 13100 13800 16400 0.11000
NJ204 20 47 14 1.1 0.7 17000 14400 13800 16400 0.14000
NU204 20 47 14 1 0.6 15800 13100 13800 16400 0.13500
NU204/C3 20 47 14 1 0.6 14400 13100 13800 16400 0.10670
N304 20 52 15 1.1 0.6 21800 17700 11400 13800 0.14470
NJ304 20 52 15 1.1 0.6 21800 17700 11400 13800 0.15750
NU304 20 52 15 1.1 0.6 21800 17700 11400 13800 0.15190
NUP304ETN1 20 52 15 1.1 0.6 31500 26800 10600 13100 0.15582
NJ2304ETN1 20 52 21 1.1 0.6 42000 38700 10000 13000 0.21267

Our Advantages

                                                              1. World-Class Bearing:
 We provide our customers with all types of indigenous bearing with world-class quality.

2. OEM or Non-Stand Bearings: 
Any requirement for Nonstandard bearings is Easily Fulfilled by us due to its vast knowledge and links in the industry.
3. Genuine products With Excellent Quality:
 The company has always proved the 100% quality products it provides with genuine intent.
4. After Sales Service and Technical Assistance: 
The company provides after-sales service and technical assistance as per the customer’s requirements and needs.
5. Quick Delivery:
 The company provides just-in-time delivery with its streamlined supply chain.

1. Samples quantity: 1-10 PCS are available.
2. Free samples: It depends on the Model No., material and quantity. Some of the bearings samples need client to pay samples charge and shipping cost.
3. It’s better to start your order with Trade Assurance to get full protection for your samples order.
The customized LOGO or drawing is acceptable for us.
1. MOQ: 10 PCS standard bearings.
2. MOQ: 1000 PCS customized your brand bearings.
1. We can printing your brand (logo, artwork)on the shield or laser engraving your brand on the shield.
2. We can custom your packaging according to your design
3. All copyright own by clients and we promised don’t disclose any info.


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 1 ton.

2.What is your latest delivery time?
Most orders will be shipped within 3-10 days of payment being received.

3.Does your company have quality assurance?
Yes, for 2 years.

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

5.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, and provide various documents required by customers for customs clearance or sales. 100% after-sales service.

6.Which payment method does your company support?
Do our best to meet customer needs, negotiable.

7.How to contact us quickly?
Please send us an inquiry or message and leave your other contact information, such as phone number, account or account, we will contact you as soon as possible and provide the detailed information you need.

Please feel free to contact us, if you have any other question

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Rolling Body: Roller Bearings
The Number of Rows: Double
Outer Dimension: Medium and Large(120-190mm)


Customized Request

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Shipping Cost:

Estimated freight per unit.

about shipping cost and estimated delivery time.
Payment Method:


Initial Payment

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

ball bearing

What are the Challenges Associated with Noise Reduction in Ball Bearings?

Noise reduction in ball bearings is a crucial consideration, especially in applications where noise levels must be minimized for operational efficiency and user comfort. While ball bearings are designed to operate smoothly, there are several challenges associated with reducing noise in their operation:

  • Vibration:

Vibration generated by the movement of rolling elements and raceways can lead to noise. Even minor irregularities in bearing components or the mounting system can cause vibration that translates into audible noise.

  • Bearing Type and Design:

The type and design of the ball bearing can impact noise generation. For example, deep groove ball bearings are known for their quiet operation, while angular contact bearings can generate more noise due to their higher contact angles.

  • Lubrication:

Improper or inadequate lubrication can result in increased friction and wear, leading to noise. Choosing the right lubricant and maintaining proper lubrication levels are essential for reducing noise in ball bearings.

  • Bearing Clearance and Preload:

Incorrect clearance or preload settings can lead to noise issues. Excessive clearance or inadequate preload can cause the rolling elements to impact the raceways, resulting in noise during rotation.

  • Material and Manufacturing Quality:

The quality of materials and manufacturing processes can affect noise levels. Inconsistent or low-quality materials, improper heat treatment, or manufacturing defects can lead to noise generation during operation.

  • Surface Finish:

The surface finish of the rolling elements and raceways can impact noise. Rough surfaces can generate more noise due to increased friction and potential irregularities.

  • Sealing and Shielding:

Seals and shields that protect bearings can influence noise levels. While they are necessary for contamination prevention, they can also cause additional friction and generate noise.

  • Operating Conditions:

External factors such as temperature, speed, and load can influence noise levels. High speeds or heavy loads can amplify noise due to increased stress on the bearing components.

  • Wear and Deterioration:

As ball bearings wear over time, noise levels can increase. Worn components or inadequate lubrication can lead to more significant noise issues as the bearing operates.

To address these challenges and reduce noise in ball bearings, manufacturers and engineers employ various techniques, such as optimizing design, selecting suitable bearing types, using proper lubrication, maintaining accurate preload settings, and ensuring high-quality materials and manufacturing processes. Noise reduction efforts are essential to improve overall product quality, meet noise regulations, and enhance user experience in various applications.

ball bearing

How do Temperature and Environmental Conditions Affect the Performance of Ball Bearings?

Temperature and environmental conditions have a significant impact on the performance and longevity of ball bearings. The operating environment can influence factors such as lubrication effectiveness, material properties, and overall bearing behavior. Here’s how temperature and environmental conditions affect ball bearing performance:

  • Lubrication:

Temperature variations can affect the viscosity and flow characteristics of lubricants. Extreme temperatures can cause lubricants to become too thin or too thick, leading to inadequate lubrication and increased friction. In high-temperature environments, lubricants can degrade, reducing their effectiveness.

  • Material Properties:

Temperature changes can alter the material properties of the bearing components. High temperatures can lead to thermal expansion, affecting bearing clearances and potentially causing interference between components. Extreme cold temperatures can make materials more brittle and prone to fracture.

  • Clearance Changes:

Temperature fluctuations can cause changes in the internal clearance of ball bearings. For instance, at high temperatures, materials expand, leading to increased clearance. This can affect bearing performance, load distribution, and overall stability.

  • Corrosion and Contamination:

Harsh environmental conditions, such as exposure to moisture, chemicals, or abrasive particles, can lead to corrosion and contamination of bearing components. Corrosion weakens the material, while contamination accelerates wear and reduces bearing life.

  • Thermal Stress:

Rapid temperature changes can result in thermal stress within the bearing components. Differential expansion and contraction between the inner and outer rings can lead to stress and distortion, affecting precision and bearing integrity.

  • Noise and Vibration:

Temperature-related changes in material properties and internal clearances can influence noise and vibration levels. Extreme temperatures can lead to increased noise generation and vibration, affecting the overall operation of machinery.

  • Lubricant Degradation:

Environmental factors like humidity, dust, and contaminants can lead to premature lubricant degradation. Oxidation, moisture absorption, and the presence of foreign particles can compromise the lubricant’s performance and contribute to increased friction and wear.

  • Seal Effectiveness:

Seals and shields that protect bearings from contaminants can be affected by temperature fluctuations. Extreme temperatures can lead to seal hardening, cracking, or deformation, compromising their effectiveness in preventing contamination.

  • Choosing Appropriate Bearings:

When selecting ball bearings for specific applications, engineers must consider the expected temperature and environmental conditions. High-temperature bearings, bearings with specialized coatings, and those with enhanced sealing mechanisms may be necessary to ensure reliable performance.

Overall, understanding the impact of temperature and environmental conditions on ball bearing performance is crucial for proper bearing selection, maintenance, and ensuring optimal operation in diverse industries and applications.

ball bearing

What are the Primary Benefits of Using Ball Bearings in Machinery and Equipment?

Ball bearings offer several primary benefits when used in machinery and equipment. Their design and functionality provide advantages that contribute to the efficient and reliable operation of various applications. Here are the key benefits:

  • Reduced Friction:

One of the primary benefits of ball bearings is their ability to minimize friction between moving parts. The rolling motion of the balls reduces the contact area and sliding friction, leading to smoother operation and less energy loss due to frictional heating.

  • Efficient Load Support:

Ball bearings are engineered to support both radial and axial loads, making them versatile for applications with multidirectional forces. This load-bearing capability allows machinery to handle different types of loads while maintaining performance and stability.

  • Smooth Rotation:

Ball bearings enable smooth and precise rotational movement. The rolling motion of the balls provides consistent motion with minimal resistance, ensuring that machinery operates smoothly and without jerks.

  • High-Speed Capability:

Due to their low friction and efficient rolling action, ball bearings are suitable for high-speed applications. They allow machinery and equipment to achieve and maintain high rotational speeds without excessive wear or heat buildup.

  • Reduced Wear and Maintenance:

The reduced friction in ball bearings leads to lower wear on components. This results in longer service intervals and reduced maintenance requirements, saving both time and maintenance costs.

  • Energy Efficiency:

By minimizing friction and reducing energy losses, ball bearings contribute to the overall energy efficiency of machinery. This is particularly important in applications where energy consumption is a concern.

  • Versatility:

Ball bearings come in various types, sizes, and configurations, allowing them to be used in a wide range of machinery and equipment. They can be customized to suit specific application requirements.

  • Reliability and Longevity:

Ball bearings are designed to withstand heavy loads and harsh operating conditions. Their durability and resistance to wear ensure reliable performance and an extended operational life.

  • Quiet Operation:

Ball bearings contribute to quiet machinery operation due to the smooth rolling motion of the balls. This is particularly important in applications where noise reduction is a consideration.

In summary, the primary benefits of using ball bearings in machinery and equipment include reduced friction, efficient load support, smooth rotation, high-speed capability, reduced wear and maintenance, energy efficiency, versatility, reliability, and quiet operation. These benefits collectively enhance the performance and longevity of machinery across various industries.

China Good quality Double Bearing Steel Tapared Roller 600mm 2 Row Ball Rolling Mill Bearings OEM   bearing and raceChina Good quality Double Bearing Steel Tapared Roller 600mm 2 Row Ball Rolling Mill Bearings OEM   bearing and race
editor by CX 2024-05-10