NNU4948-S-M-SP 240x320x80 Bearing
Double Row Cylindrical Roller Bearings
The NNU4948-S-M-SP Double Row Cylindrical Roller Bearing is designed for high precision and heavy-duty applications. With a bore diameter of 240 mm, an outside diameter of 320 mm, and a width of 80 mm, this bearing provides excellent load-carrying capacity and stability. Its machined brass cage ensures durability, while the high-precision SP class tolerance offers superior performance in critical machinery. This bearing is commonly used in industrial equipment, such as gearboxes, rolling mills, and machine tools, ensuring optimal reliability and minimal maintenance even in demanding environments.
Performance Overview of the NNU4948-S-M-SP Bearings
| Category | Specification |
|---|---|
| Brand | AMIGO NNU4948-S-M-SP | Interchangeable With: SKF NNU4948-S-M-SP |
| Bore Diameter (d) | 240 mm |
| Outside Diameter (D) | 320 mm |
| Width (B) | 80 mm |
| Bearing Part | Complete Bearing |
| Number of Rows | 2 |
| Bore Type | Cylindrical |
| Cage | Machined Metal |
| Design | NNU |
| Number of Flanges, Outer Ring | 3 |
| Number of Flanges, Inner Ring | 0 |
| Loose Flange | None |
| Radial Internal Clearance | CN |
| Tolerance Class | Class SP (SP) |
| Material, Bearing | Bearing Steel |
| Coating | Without |
| Sealing | Without |
| Lubricant | None |
| Relubrication Feature | Annular Groove and Lubrication Holes |
| Basic Dynamic Load Rating | 528 kN |
| Basic Static Load Rating | 1,220 kN |
| Attainable Speed for Grease Lubrication | 2,200 r/min |
| Attainable Speed for Oil-air Lubrication | 2,600 r/min |
| Product Net Weight | 18.3 kg |
| Dimensions(mm) | 240x320x80 |
| Category | Specification |
|---|---|
| Brand | AMIGO NNU4948-S-M-SP | Interchangeable With: SKF NNU4948-S-M-SP |
| Bore Diameter | 9.449 in |
| Outside Diameter | 12.598 in |
| Width | 3.15 in |
| Bearing Part | Complete Bearing |
| Number of Rows | 2 |
| Bore Type | Cylindrical |
| Cage | Machined Metal |
| Design | NNU |
| Number of Flanges, Outer Ring | 3 |
| Number of Flanges, Inner Ring | 0 |
| Loose Flange | None |
| Radial Internal Clearance | CN |
| Tolerance Class | Class SP (SP) |
| Material, Bearing | Bearing Steel |
| Coating | Without |
| Sealing | Without |
| Lubricant | None |
| Relubrication Feature | Annular Groove and Lubrication Holes |
| Basic Dynamic Load Rating | 118,699 lbf |
| Basic Static Load Rating | 274,267 lbf |
| Attainable Speed for Grease Lubrication | 2,200 r/min |
| Attainable Speed for Oil-Air Lubrication | 2,600 r/min |
| Product Net Weight | 40.433 lb |
| Dimensions(in) | 9.449x12.598x3.15 |
Specifications Overview of the NNU4948-S-M-SP Bearings
| Category | Specification |
|---|---|
| Bore Diameter (d) | 240 mm |
| Outside Diameter (D) | 320 mm |
| Width (B) | 80 mm |
| Shoulder Diameter Outer Ring (D1) | 292.2 mm |
| Raceway Diameter Inner Ring (F) | 265 mm |
| Width Annular Lubrication Groove (b) | 111 mm |
| Diameter Lubrication Hole (K) | 3 mm |
| Chamfer Dimension Outer Ring (r1,2) | Min. 2.1 mm |
| Chamfer Dimension Inner Ring (r3,4) | Min. 2.1 mm (Bearing with Tapered Bore) |
| Permissible Axial Displacement (s) | Max. 3.7 mm |
| Abutment Diameter Shaft (da) | Min. 251 mm |
| Abutment Diameter Shaft NNU Design (da) | Max. 262 mm |
| Abutment Diameter Shaft NNU Design (db) | Min. 269 mm |
| Abutment Diameter Housing (Da) | Max. 309 mm |
| Fillet Radius (ra) | Max. 2 mm |
| Oil Nozzle Position (dn) | 267 mm |
| Category | Specification |
|---|---|
| Bore Diameter (d) | 9.449 in |
| Outside Diameter (D) | 12.598 in |
| Width (B) | 3.15 in |
| Shoulder Diameter Outer Ring (D1) | 11.504 in |
| Raceway Diameter Inner Ring (F) | 10.433 in |
| Width Annular Lubrication Groove (b) | 0.437 in |
| Diameter Lubrication Hole (K) | 0.118 in |
| Chamfer Dimension Outer Ring (r1,2) | Min. 0.083 in |
| Chamfer Dimension Inner Ring (r3,4) | Min. 0.083 in (Bearing with Tapered Bore) |
| Permissible Axial Displacement (s) | Max. 0.146 in |
| Abutment Diameter Shaft (da) | Min. 9.882 in |
| Abutment Diameter Shaft NNU Design (da) | Max. 10.315 in |
| Abutment Diameter Shaft NNU Design (db) | Min. 10.591 in |
| Abutment Diameter Housing (Da) | Max. 12.165 in |
| Fillet Radius (ra) | Max. 0.079 in |
| Oil Nozzle Position (dn) | 10.512 in |
Applicable Machines and Industries
The NNU4948-S-M-SP Double Row Cylindrical Roller Bearings are typically used in various industrial applications that require high precision and heavy-load capacity. These bearings are essential for machinery where there is a need for high rigidity and minimal deflection under heavy loads, such as in rolling mills, machine tools, and large gearboxes. Below is a detailed overview of suitable machinery, their function, and interchangeable bearing brands or series:
Suitable Machines:
- Rolling Mills:
- Function: These bearings are used in rolling mills to support large rollers that are responsible for flattening or shaping metal sheets. Their high load capacity helps withstand the heavy radial loads and the high-precision design ensures smooth operation.
- Machine Tools:
- Function: NNU4948-S-M-SP bearings are utilized in machine tools to maintain the precision of the spindle and other critical rotating parts. These bearings ensure high accuracy in cutting and milling operations.
- Gearboxes:
- Function: In large gearboxes, these bearings manage radial forces generated by the gear mechanisms. Their stability and load capacity ensure consistent performance in demanding environments.
- Steel Processing Equipment:
- Function: These bearings are applied in steel processing equipment where they handle extreme loads and help guide the processing rollers, providing durability and longevity under harsh operating conditions.
- Paper Machinery:
- Function: Used in paper manufacturing equipment, they assist in supporting large cylindrical components, ensuring the smooth, continuous operation required in paper production.
- Cranes and Hoisting Equipment:
- Function: In cranes, the bearings support the rotating parts, enabling the lifting and handling of heavy loads.
Interchangeable Bearing Brands or Series:
SKF NNU 4948 B/SPW33
- SKF is known for high-quality bearings, and their NNU 4948 B/SPW33 can be used interchangeably in similar applications.
FAG NNU4948-S-K-M-SP
- FAG offers a direct equivalent with their NNU4948-S-K-M-SP, which meets the same high precision and load-bearing requirements.
NSK NNU4948MBKR
- NSK’s NNU4948MBKR is another viable alternative known for its performance in high-rigidity applications.
NTN NNU4948K
- NTN’s version, NNU4948K, offers compatibility for heavy-duty industrial applications, ensuring precision and reliability.
KOYO NNU4948
- KOYO provides a robust alternative with their NNU4948 bearing, suited for similar industrial environments requiring high load capacity and accuracy.
These interchangeable brands offer similar performance and specifications, ensuring that users have multiple options when replacing or upgrading their bearing systems.
NNU4948-S-M-SP Bearing Cross Reference and Interchange
| Brand | Interchange Bearing Series |
|---|---|
| FAG | NNU4948-S-M-SP |
| SKF | NNU 4948 B/SPW33 |
| Amigo | NNU4948-S-M-SP |
This table highlights the interchangeable series between the different manufacturers, which provides flexibility for replacement based on availability or brand preference.
Choosing the Right Bearing
To enhance the product comparison module for the NNU4948-S-M-SP Double Row Cylindrical Roller Bearings and help customers make better purchasing decisions, here’s an effective comparison approach:
When to Choose Amigo NNU4948-S-M-SP
- Higher Quality Materials: The Amigo NNU4948-S-M-SP is manufactured using superior alloy steels and undergoes rigorous quality control to ensure long-lasting performance even in extreme operating conditions.
- Precision: This bearing offers Super Precision (SP) class tolerance, which is ideal for applications requiring minimal friction and high accuracy.
- Temperature Resilience: With an operating range from -30°C to +150°C, this bearing is perfect for high-performance machinery operating in fluctuating or extreme temperatures.
- Cost-Effective: Amigo bearings provide the same level of performance as SKF or FAG bearings but are offered at a more competitive price, making them an excellent choice for budget-conscious buyers who do not want to compromise on quality.
Conclusion
The Amigo NNU4948-S-M-SP Double Row Cylindrical Roller Bearing offers the same high performance as other well-known brands like SKF and FAG, but with additional advantages in terms of price and material quality. This makes it the optimal choice for customers who are looking for value without sacrificing the precision and durability required for demanding industrial applications.
| Feature | Amigo NNU4948-S-M-SP | SKF NNU 4948 B/SPW33 | FAG NNU4948-S-M-SP |
|---|---|---|---|
| Dynamic Load Rating (kN) | 530 kN | 530 kN | 530 kN |
| Static Load Rating (kN) | 1,210 kN | 1,210 kN | 1,210 kN |
| Fatigue Load Limit (kN) | 138 kN | 138 kN | 138 kN |
| Radial Internal Clearance | C1 | C1 | C1 |
| Tolerance Class | SP (Super Precision) | SP (Super Precision) | SP (Super Precision) |
| Cage Type | Brass Cage | Brass Cage | Brass Cage |
| Operating Temperature Range | -30°C to +150°C | -30°C to +150°C | -30°C to +150°C |
| Weight | 25.6 kg | 25.6 kg | 25.6 kg |
| Lubrication Options | Grease/Oil | Grease/Oil | Grease/Oil |
| Design Feature | Double Row Design | Double Row Design | Double Row Design |
| Manufacturer's Warranty | Yes | Yes | Yes |
Recommended Products for Optimal Performance
Enhance your bearing operations with these related products:
Why Amigo NNU4948-S-M-SP Bearings Are the Top Choice
"I've been using Amigo NNU4948-S-M-SP Double Row Cylindrical Roller Bearings for several months now in our industrial presses, and the results have been exceptional. The performance is on par with the SKF bearings we previously used, offering the same high load capacity and smooth operation. These bearings are durable, reliable, and the installation was a breeze. Definitely a great choice if you're looking for premium quality without the premium price tag."
Natalie Daniell
"After switching to Amigo NNU4948-S-M-SP bearings for our rolling mills, I have to say they perform just as well as the SKF bearings we used to use. The build quality is excellent, and they handle high loads without any issue. We haven't had any downtime since we made the switch, and that says a lot about their durability. If you’re considering an alternative to SKF, Amigo is a solid option."
Tom Stella
"We replaced our existing bearings with Amigo NNU4948-S-M-SP Double Row Cylindrical Roller Bearings, and we couldn’t be more satisfied. The performance is very similar to what we experienced with SKF bearings in terms of load handling and longevity. These Amigo bearings have exceeded expectations, especially in high-demand applications, and we will definitely continue using them."
Rachel Joyce
"I was initially skeptical about switching to Amigo NNU4948-S-M-SP bearings from SKF, but after using them in our heavy machinery, I am thoroughly impressed. They operate smoothly under high loads and in demanding conditions. The quality is top-notch, and honestly, I can’t tell the difference in performance compared to SKF. I highly recommend these bearings for any industrial application."
Griselda Susan
Explore More on Bearings
