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 |
| Standard | DIN GB ISO JIS |
| Bearing Package | Barreled, bagged, boxed, palletized or as customers’ requirement. |
| Service | OEM service provided |
| Delivery time | 3-10 days depends on quantity needed |
Characteristics:
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.
SAMPLES
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.
CUSTOMIZED
The customized LOGO or drawing is acceptable for us.
MOQ
1. MOQ: 10 PCS standard bearings.
2. MOQ: 1000 PCS customized your brand bearings.
OEM POLICY
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.
FAQ
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) |
| Customization: |
Available
| Customized Request |
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| Shipping Cost:
Estimated freight per unit. |
about shipping cost and estimated delivery time. |
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| Payment Method: |
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|---|---|
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Initial Payment Full Payment |
| Currency: | US$ |
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| Return&refunds: | You can apply for a refund up to 30 days after receipt of the products. |
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What Role do Seals and Enclosures Play in Protecting Slewing Bearings from Contaminants?
Seals and enclosures play a crucial role in safeguarding slewing bearings from contaminants, moisture, and other external factors that can lead to premature wear and damage. Here’s how seals and enclosures contribute to the protection of slewing bearings:
- Contaminant Exclusion:
Seals and enclosures create a physical barrier that prevents contaminants like dust, dirt, sand, and particles from entering the bearing’s internal components. This exclusion minimizes abrasive wear and preserves the integrity of the rolling elements and raceways.
- Moisture and Corrosion Prevention:
Seals and enclosures provide a shield against moisture and water ingress, crucial in preventing corrosion and rust formation on bearing surfaces. Corrosion-resistant seals are particularly valuable in marine and humid environments.
- Chemical and Chemical Vapor Resistance:
Specialized seals and enclosures can offer resistance to chemicals, acids, and corrosive substances that might be present in the operating environment. This protection prevents chemical damage to the bearing’s components.
- Lubrication Retention:
Seals and enclosures help retain the lubricant within the bearing, preventing it from leaking out and ensuring consistent lubrication for smooth operation. This is essential for reducing friction and wear.
- Prevention of Solid Particle Contamination:
Seals and enclosures block solid particles from entering the bearing chamber, reducing the risk of particle-induced wear, surface damage, and premature failure.
- Temperature Regulation:
Some seals and enclosures offer thermal insulation, which helps regulate the operating temperature of the bearing. This can be crucial in applications with extreme temperature variations.
- Enhanced Longevity:
By protecting the bearing from contaminants and adverse environmental conditions, seals and enclosures contribute to the extension of the bearing’s operational life, reducing the need for frequent replacements.
- Sealing Types:
Seals can come in various types, including lip seals, labyrinth seals, and specialized designs. The choice of seal depends on the application’s requirements and the level of protection needed.
- Proper Installation and Maintenance:
Proper installation and regular inspection of seals and enclosures are essential to ensure their effectiveness. Damaged or worn seals should be promptly replaced to maintain protection.
In summary, seals and enclosures serve as a critical defense mechanism for slewing bearings against contaminants, moisture, and harmful substances. They contribute to the bearing’s reliability, performance, and overall longevity in various operating environments.
Are there any Specific Safety Precautions to Take When Working with Slewing Bearings?
Working with slewing bearings involves certain safety considerations to prevent accidents and ensure the well-being of personnel. Here are some specific safety precautions to take:
- Training and Knowledge:
Ensure that personnel working with slewing bearings are properly trained and have a clear understanding of the equipment, procedures, and safety protocols.
- Protective Equipment:
Use appropriate personal protective equipment (PPE), including gloves, safety goggles, and hearing protection, to safeguard against potential hazards.
- Lockout/Tagout:
Follow lockout/tagout procedures when performing maintenance or repairs. Locking out equipment prevents unexpected activation and potential hazards.
- Machine Shutdown:
Before working on machinery containing slewing bearings, ensure that the equipment is properly shut down, power sources are disconnected, and any stored energy is released.
- Proper Tools:
Use suitable tools and equipment for maintenance and assembly to prevent accidents and ensure accurate work.
- Weight Handling:
If handling heavy slewing bearing components, use appropriate lifting equipment and techniques to avoid strain or injury.
- Secure Work Area:
Ensure that the work area is clean, organized, and free from obstacles. This reduces the risk of tripping hazards and improves overall safety.
- Work with a Partner:
Whenever possible, perform tasks involving slewing bearings with a partner. Having someone nearby can provide assistance in case of emergencies.
- Safe Access:
Ensure safe access to the work area, including the use of stable platforms or ladders, to prevent falls or slips.
- Warning Signs:
Use proper warning signs and labels to alert others about ongoing maintenance or potential hazards related to slewing bearings.
- Manufacturer Guidelines:
Adhere to the manufacturer’s recommendations for maintenance, lubrication, and safety practices specific to the slewing bearings being worked on.
- Emergency Procedures:
Have clear emergency procedures in place and communicate them to all personnel. Know the location of emergency equipment and exits.
By following these safety precautions, you can minimize risks associated with working on slewing bearings and create a safer environment for maintenance personnel.
What are the Advantages of Using Slewing Bearings in Industrial Applications?
Slewing bearings offer several advantages that make them valuable components in various industrial applications. Some of the key advantages include:
- High Load-Carrying Capacity: Slewing bearings are designed to handle significant axial, radial, and moment loads simultaneously, making them suitable for heavy-duty industrial equipment.
- Space and Weight Savings: Slewing bearings enable compact designs by combining axial and radial bearing functions into a single unit. This helps save space and reduces the overall weight of machinery.
- Smooth Rotational Movement: The design of slewing bearings ensures smooth and precise rotation, contributing to the efficiency and performance of machinery and equipment.
- Minimal Maintenance: Properly lubricated slewing bearings require minimal maintenance due to their robust construction and efficient load distribution.
- Enhanced Durability: Slewing bearings are built to withstand harsh environmental conditions, heavy loads, and repetitive movements, leading to long service life.
- Cost Efficiency: Despite their initial investment, the extended lifespan and low maintenance requirements of slewing bearings result in cost savings over time.
- Customizability: Slewing bearings can be tailored to specific application requirements, including size, load capacity, and sealing options.
- Precise Positioning: Slewing bearings with integral gearing systems allow for accurate positioning, making them ideal for applications that demand controlled movement.
- Versatility: They are used in a wide range of industries, including construction, manufacturing, energy, transportation, and more.
- Reduced Friction and Wear: The rolling-element design of slewing bearings reduces friction and wear, contributing to efficient operation and extended component life.
Overall, the advantages of slewing bearings make them indispensable in industrial applications where reliable and efficient rotational movement is required.
editor by CX 2024-04-04
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