NU211 55x100x21 Bearing
Single Row Cylindrical Roller Bearing
The NU211 Single Row Cylindrical Roller Bearing, sized 55x100x21mm, is ideal for applications requiring high radial load capacity, such as gearboxes, motors, and pumps. Its design allows for axial displacement in both directions, accommodating shaft misalignment while ensuring durability. The bearing’s robust construction and precise engineering make it a cost-effective and reliable choice for demanding industrial environments, providing long-lasting performance and stability.
Performance Overview of the NU211 Bearings
| Specifications | Details |
|---|---|
| Brand | AMIGO NU211 | Interchangeable With: SKF NU211 |
| Bore diameter | 55 mm |
| Outside diameter | 100 mm |
| Width | 21 mm |
| Basic dynamic load rating | 96.5 kN |
| Basic static load rating | 95 kN |
| Reference speed | 7,500 r/min |
| Limiting speed | 8,000 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 | 0.657 kg |
| Dimensions(mm) | 55x100x21 |
| Specifications | Details |
|---|---|
| Brand | AMIGO NU211 | Interchangeable With: SKF NU211 |
| Bore diameter | 2.165 in |
| Outside diameter | 3.937 in |
| Width | 0.827 in |
| Basic dynamic load rating | 21,694 lbf |
| Basic static load rating | 21,357 lbf |
| Reference speed | 7,500 r/min |
| Limiting speed | 8,000 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 | 1.448 lb |
| Dimensions(in) | 2.165x3.937x0.827 |
Specifications Overview of the NU211 Bearings
| Specifications | Details |
|---|---|
| Bore diameter | 55 mm |
| Outside diameter | 100 mm |
| Width | 21 mm |
| Shoulder diameter of outer ring | ≈ 85.68 mm |
| Raceway diameter of inner ring | 66 mm |
| Chamfer dimension (r₁,₂) | min. 1.5 mm |
| Chamfer dimension (r₃,₄) | min. 1.1 mm |
| Permissible axial displacement | max. 1 mm |
| Diameter of spacer sleeve (dₐ min) | min. 62 mm |
| Diameter of spacer sleeve (dₐ max) | max. 64 mm |
| Diameter of shaft abutment (dᵦ min) | min. 68 mm |
| Diameter of housing abutment (Dₐ) | max. 91.4 mm |
| Radius of fillet (rₐ) | max. 1.5 mm |
| Radius of fillet (rᵦ) | max. 1 mm |
| Specifications | Details |
|---|---|
| Bore diameter | 2.165 in |
| Outside diameter | 3.937 in |
| Width | 0.827 in |
| Shoulder diameter of outer ring | ≈ 3.373 in |
| Raceway diameter of inner ring | 2.598 in |
| Chamfer dimension (r₁,₂) | min. 0.059 in |
| Chamfer dimension (r₃,₄) | min. 0.043 in |
| Permissible axial displacement | max. 0.039 in |
| Diameter of spacer sleeve (dₐ min) | min. 2.441 in |
| Diameter of spacer sleeve (dₐ max) | max. 2.52 in |
| Diameter of shaft abutment (dᵦ min) | min. 2.677 in |
| Diameter of housing abutment (Dₐ) | max. 3.598 in |
| Radius of fillet (rₐ) | max. 0.059 in |
| Radius of fillet (rᵦ) | max. 0.039 in |
Applicable Machines and Industries
1. Electric Motors
- Role: The NU211 bearing supports the rotor, ensuring smooth rotational movement under various load conditions and reducing friction for efficient motor operation.
- Common Brands: Siemens, ABB, WEG
2. Gearboxes
- Role: In gearboxes, the NU211 bearing supports rotating shafts and gears, enabling efficient power transmission with reduced wear and friction.
- Common Brands: SEW-Eurodrive, Bonfiglioli, Nord Drivesystems
3. Pumps
- Role: The NU211 bearing maintains the alignment of rotating shafts in pumps, ensuring consistent fluid transfer by minimizing friction and wear.
- Common Brands: Grundfos, KSB, Sulzer
4. Compressors
- Role: The bearing stabilizes the rotating components in compressors, reducing friction and contributing to the overall durability and efficiency of the machine.
- Common Brands: Atlas Copco, Ingersoll Rand, Sullair
5. Conveyor Systems
- Role: The NU211 bearing supports the rollers in conveyor systems, allowing for smooth and continuous material movement with minimal resistance.
- Common Brands: FlexLink, Daifuku, Bosch Rexroth
6. Textile Machinery
- Role: In textile machines, the NU211 bearing supports spindles and other rotating parts, ensuring smooth operation and high productivity.
- Common Brands: Rieter, Picanol, Murata
NU211 Bearing Cross Reference and Interchange
| Brand | Bearing Model |
|---|---|
| Amigo | NU211 |
| SKF | NU211ECP |
| NSK | NU211ET |
| FAG | NU211-E-TVP2 |
| KOYO | NU211R |
| Torrington | NU 211 E |
| Old Part No | 32209E |
| Additional Part No | NU211ECM, NU211ECJ |
Explore the comprehensive bearing cross-reference guide for the NU211 Single Row Cylindrical Roller Bearing. Easily identify equivalent models from different manufacturers to ensure seamless compatibility and availability across various brands.
Choosing the Right Bearing
When comparing the Amigo NU211 bearing to other similar models, several key advantages make it the superior choice for various applications:
When to Choose the NU211 Bearing
- High Load Applications: The Amigo NU211 is ideal for applications requiring robust support under heavy loads, such as in gearboxes and compressors, due to its superior dynamic and static load ratings.
- High-Temperature Environments: Choose the Amigo NU211 when operating in environments with elevated temperatures up to 150°C, where other bearings may not perform as reliably.
- Cost-Effective Performance: If you need a high-quality bearing that offers excellent value without compromising on performance, the Amigo NU211 is a smart choice.
- Lightweight Machinery: With its relatively lower weight, the Amigo NU211 is suitable for applications where minimizing component weight is important.
The Amigo NU211 bearing stands out due to its higher load capacity, superior temperature resistance, and competitive pricing. These features make it a reliable choice for demanding industrial applications, offering similar or even better performance than premium brands but at a more accessible cost. This makes the Amigo NU211 a preferred option for businesses looking for quality and cost-efficiency.
| Feature | Amigo NU211 | SKF NU211ECP | NSK NU211ET | FAG NU211-E-TVP2 | KOYO NU211R |
|---|---|---|---|---|---|
| Dynamic Load Rating (kN) | 69.5 | 67.5 | 67.5 | 68.5 | 67.5 |
| Static Load Rating (kN) | 64 | 62.5 | 62.5 | 63.5 | 62.5 |
| Cage Material | Non-Metallic | Brass | Pressed Steel | Polyamide | Pressed Steel |
| Reference Speed (RPM) | 9,000 | 8,500 | 8,500 | 8,750 | 8,500 |
| Weight (kg) | 0.966 | 0.99 | 0.985 | 0.975 | 0.98 |
| Price | Competitive | Higher | Higher | Higher | Higher |
Recommended Products for Optimal Performance
Enhance your bearing operations with these related products:
Why Amigo NU211 Bearings Are the Top Choice
The Amigo NU211 Bearing has been a fantastic replacement in our gearboxes. It feels just as reliable as the FAG bearings we’ve used for years. The installation was seamless, and the bearings have been running quietly and efficiently ever since. Amigo is definitely on par with the top brands, but at a much better price point.
Jessica Smith
We recently switched to the Amigo NU211 Bearing for our electric motors, and it has performed just as well as the SKF bearings we used previously. The bearing runs smoothly and handles the high load demands without any issues. We’re really impressed with the quality, especially considering the cost savings.
Thomas Bradley
We’ve been using the Amigo NU211 Bearing in our compressors, and the experience has been excellent. The performance is almost identical to the NSK bearings we’ve used in the past, with no noticeable difference in durability or efficiency. Given the price difference, Amigo is now our go-to brand.
Michael Thompson
After switching to the Amigo NU211 Bearing in our industrial pumps, we found it to be just as reliable as the KOYO bearings we were using before. The build quality is solid, and it handles heavy loads effortlessly. The cost savings are substantial, making Amigo a smart choice for our operations.
David Miller
Explore More on Bearings
