NU308 40x90x23 Bearing
Single Row Cylindrical Roller Bearing
The NU308 bearing features a single row of cylindrical rollers, which are positioned between the inner and outer raceways. This design allows the bearing to accommodate high radial loads, making it ideal for heavy-duty applications. The rollers are guided by the raceways, ensuring smooth and efficient operation with minimal friction. The bearing’s design also allows for some axial displacement, which helps in accommodating slight misalignments or thermal expansion of the shaft within the housing.
Performance Overview of the NU308 Bearings
| Parameter | Value |
|---|---|
| Brand | AMIGO NU308 | Interchangeable With: SKF NU308 |
| Bore diameter | 40 mm |
| Outside diameter | 90 mm |
| Width | 23 mm |
| Basic dynamic load rating | 93 kN |
| Basic static load rating | 78 kN |
| Reference speed | 8,000 r/min |
| Limiting speed | 9,500 r/min |
| Bearing part | Complete bearing |
| Axial displacement capability | In both directions |
| Number of rows | 1 |
| Locating feature, bearing outer ring | None |
| Bore type | Cylindrical |
| Cage | Non-metallic |
| Number of flanges, outer ring | 2 |
| Number of flanges, inner ring | 0 |
| Loose flange | None |
| Radial internal clearance | CN |
| Tolerance class | Normal |
| Coating | Without |
| Sealing | Without |
| Lubricant | None |
| Relubrication feature | Without |
| Product net weight | 0.649 kg |
| Dimensions(mm) | 40x90x23 |
| Parameter | Value |
|---|---|
| Brand | AMIGO NU308 | Interchangeable With: SKF NU308 |
| Bore diameter | 1.575 in |
| Outside diameter | 3.543 in |
| Width | 0.906 in |
| Basic dynamic load rating | 20,907 lbf |
| Basic static load rating | 17,535 lbf |
| Reference speed | 8,000 r/min |
| Limiting speed | 9,500 r/min |
| Bearing part | Complete bearing |
| Axial displacement capability | In both directions |
| Number of rows | 1 |
| Locating feature, bearing outer ring | None |
| Bore type | Cylindrical |
| Cage | Non-metallic |
| Number of flanges, outer ring | 2 |
| Number of flanges, inner ring | 0 |
| Loose flange | None |
| Radial internal clearance | CN |
| Tolerance class | Normal |
| Coating | Without |
| Sealing | Without |
| Lubricant | None |
| Relubrication feature | Without |
| Product net weight | 1.431 lb |
| Dimensions(mm) | 40x90x23 |
Specifications Overview of the NU308 Bearings
| Parameter | Value |
|---|---|
| Bore diameter | 40 mm |
| Outside diameter | 90 mm |
| Width | 23 mm |
| Raceway diameter of inner ring | 52 mm |
| Chamfer dimension (r?,?) | min. 1.5 mm |
| Chamfer dimension (r?,?) | min. 1.5 mm |
| Permissible axial displacement | max. 1.4 mm |
| Diameter of spacer sleeve (d? min.) | min. 48 mm |
| Diameter of spacer sleeve (d? max.) | max. 50 mm |
| Diameter of shaft abutment (d? min.) | min. 54 mm |
| Diameter of housing abutment (D? max.) | max. 81.8 mm |
| Radius of fillet (r?) | max. 1.5 mm |
| Radius of fillet (r_b) | max. 1.5 mm |
| Dimensions | Value |
|---|---|
| Bore diameter | 1.575 in |
| Outside diameter | 3.543 in |
| Width | 0.906 in |
| Raceway diameter of inner ring | 2.047 in |
| Chamfer dimension (r?,?) | min. 0.059 in |
| Chamfer dimension (r?,?) | min. 0.059 in |
| Permissible axial displacement | max. 0.055 in |
| Diameter of spacer sleeve (d? min.) | min. 1.89 in |
| Diameter of spacer sleeve (d? max.) | max. 1.969 in |
| Diameter of shaft abutment (d? min.) | min. 2.126 in |
| Diameter of housing abutment (D? max.) | max. 3.22 in |
| Radius of fillet (r?) | max. 0.059 in |
| Radius of fillet (r_b) | max. 0.059 in |
Applicable Machines and Industries
The NU308 Single Row Cylindrical Roller Bearing is a versatile component widely used in various types of machinery due to its ability to handle high radial loads and operate at high speeds. Below are the types of machines that commonly use the NU308 bearing, the role it plays in these machines, and the common brands associated with each type:
1. Electric Motors
Role: In electric motors, the NU308 bearing supports the rotor shaft, ensuring smooth rotation while minimizing friction. It handles the radial loads generated by the motor’s operation and maintains the alignment of the rotating components.
Common Brands:Siemens、ABB、WEG、Toshiba
2. Pumps (Centrifugal Pumps, Gear Pumps)
Role: The NU308 bearing is used to support the pump shafts, enabling smooth and efficient rotation. It helps to sustain radial loads and ensures the stable operation of the pump’s internal components.
Common Brands:Grundfos、KSB、Sulzer、Flowserve
3. Gearboxes
Role: In gearboxes, the NU308 bearing is crucial for supporting the shafts and gears. It helps in reducing friction and wear between the rotating components, contributing to the efficient transmission of power.
Common Brands:SEW-Eurodrive、Bonfiglioli、Flender、Nord Drivesystems
4. Conveyor Systems
Role: The NU308 bearing is used in conveyor systems to support the rollers and ensure their smooth rotation. It helps in handling the radial loads imposed by the weight of the materials being transported.
Common Brands:FlexLink、Dorner、Interroll、Rexnord
5. Machine Tools (Lathes, Milling Machines)
Role: In machine tools, the NU308 bearing supports the spindle, allowing it to rotate at high speeds with minimal friction. This is crucial for maintaining precision and accuracy in machining operations.
Common Brands:DMG Mori、Haas、Mazak、Okuma
6. Industrial Fans and Blowers
Role: The NU308 bearing supports the fan shafts, ensuring their stable and smooth rotation. It handles the radial loads and maintains the proper alignment of the rotating components, which is essential for the efficient operation of the fan.
Common Brands:ABB、Howden、Greenheck、FläktGroup
NU308 Bearing Cross Reference and Interchange
| Manufacturer | Bearing Model |
|---|---|
| Amigo | NU308 |
| SKF | NU308 ECM |
| FAG | NU308E-XL-TVP2 |
| NTN | NU308 |
| KOYO | NU308R |
| NSK | NU308EM |
The cross-reference guide lists common equivalent models from reputable manufacturers like SKF, FAG, NTN, KOYO, and NSK, allowing users to interchange bearings easily while maintaining the same performance and reliability
Choosing the Right Bearing
To assist users in making informed purchasing decisions, this module provides a detailed comparison between the Amigo NU308 bearing and other similar models from leading manufacturers.
When to Choose Amigo NU308 Bearings
1. High-Load Applications
- The Amigo NU308 has a superior dynamic and static load rating compared to some other models, making it ideal for applications where high radial loads are prevalent, such as in heavy machinery, electric motors, and gearboxes.
2. High-Speed Operations
- With a higher maximum lubrication speed, the Amigo NU308 is better suited for applications requiring high-speed rotation, such as industrial fans, pumps, and compressors. It can maintain its performance at speeds up to 9400 r/min with oil lubrication, outperforming several competitors.
3. Harsh Operating Environments
- The Amigo NU308 operates efficiently in a wide temperature range from -40°C to 120°C, making it a reliable choice for applications in extreme environments. Its ability to perform under such conditions ensures longevity and durability.
4. Cost-Effective Solution
- The Amigo NU308 is priced competitively, offering a cost-effective solution without compromising on quality. When compared to other bearings, it provides an excellent balance between price and performance, making it a valuable investment for budget-conscious buyers.
5. Customization and Availability
- Amigo offers customization options for the NU308 bearing, allowing it to be tailored to specific application requirements. Additionally, the Amigo NU308 is readily available, ensuring quick delivery and minimal downtime for your operations.
| Feature | Amigo NU308 | SKF NU308 ECM | FAG NU308E-XL-TVP2 | NTN NU308 | KOYO NU308R | NSK NU308EM |
|---|---|---|---|---|---|---|
| Material Quality | High-grade steel | High-quality steel | High-quality steel | High-grade steel | Standard steel | High-quality steel |
| Dynamic Load Rating (C) | 65 kN | 64 kN | 63 kN | 64 kN | 63 kN | 64 kN |
| Static Load Rating (C?) | 57 kN | 56 kN | 55 kN | 56 kN | 55 kN | 56 kN |
| Fatigue Limit Load (Cu) | 6.95 kN | 6.85 kN | 6.80 kN | 6.85 kN | 6.75 kN | 6.85 kN |
| Lubrication Speed (Oil) | 9400 r/min | 9200 r/min | 9000 r/min | 9200 r/min | 9000 r/min | 9200 r/min |
| Lubrication Speed (Grease) | 8000 r/min | 7800 r/min | 7600 r/min | 7800 r/min | 7600 r/min | 7800 r/min |
| Weight | 0.658 kg | 0.662 kg | 0.670 kg | 0.662 kg | 0.670 kg | 0.662 kg |
| Precision and Tolerance | High precision, Normal tolerance | High precision, Normal tolerance | High precision, Normal tolerance | High precision, Normal tolerance | Standard precision, Normal tolerance | High precision, Normal tolerance |
| Price | Competitive | Higher | Moderate | Moderate | Lower | Moderate |
| Warranty | Extended | Standard | Standard | Standard | Standard | Standard |
| Custom Features Available | Yes | No | No | No | No | No |
| Availability | In stock | Limited availability | In stock | In stock | In stock | Limited availability |
Recommended Products for Optimal Performance
Enhance your bearing operations with these related products:
Why Amigo NU308 Bearings Are the Top Choice
"I recently installed the Amigo NU308 Bearing in my industrial gearbox, and I must say I am thoroughly impressed. The performance and build quality of this bearing are on par with some of the top brands like SKF. It handles high loads and operates smoothly even at high speeds. If you're looking for a cost-effective alternative without compromising on quality, the Amigo NU308 is definitely worth considering."
Elwin Conn
"I've been using SKF bearings for years, but decided to give the Amigo NU308 a try after hearing good things about it. I was pleasantly surprised by how well it performed. The bearing feels just as robust and reliable as the SKF bearings I'm used to. The installation was seamless, and it's been running flawlessly ever since. Highly recommended if you're looking for a high-quality bearing at a more affordable price!"
Lilyan Rau
"As a maintenance engineer, I’m always on the lookout for reliable and durable components. I decided to test the Amigo NU308 Bearing and was amazed by its performance. It’s as smooth and durable as the FAG bearings we usually use, but at a better price point. This bearing has been running in our pumps for months without any issues, and I wouldn’t hesitate to use it again in future projects. It’s a solid choice that rivals the top brands."
Julien Bogisich
"The Amigo NU308 Bearing has exceeded my expectations in every way. I’ve used SKF and NTN bearings in the past, and the Amigo NU308 feels very similar in terms of quality and performance. The bearing operates quietly and efficiently, even under heavy loads. I was particularly impressed with how well it handled high-speed applications without any noticeable wear. If you're looking for a reliable alternative to the big-name brands, the Amigo NU308 is a fantastic option."
Leo Streich
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