NNU 4930 B/SPW33 150x210x60 Bearing
Double Row Cylindrical Roller Bearings
The NNU 4930 B/SPW33 Double Row Cylindrical Roller Bearing is engineered for heavy-load applications, featuring a cylindrical bore and optimized for high-speed performance. With a robust design, this bearing is suitable for demanding industrial environments such as steel mills, paper machinery, and gearboxes. It offers superior radial load capacity, enhanced rigidity, and low friction, ensuring long operational life. Manufactured using premium-grade steel, this bearing guarantees precision and durability. Ideal for use in high-precision applications, it can replace similar models from leading brands like SKF and FAG.
Performance Overview of the NNU 4930 B/SPW33 Bearings
| Category | Specification |
|---|---|
| Brand | AMIGO NNU 4930 B/SPW33 | Interchangeable With: SKF NNU 4930 B/SPW33 |
| Bore diameter | 150 mm |
| Outside diameter | 210 mm |
| Width | 60 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 | 330 kN |
| Basic static load rating | 655 kN |
| Attainable speed for grease lubrication | 3800 r/min |
| Attainable speed for oil-air lubrication | 4300 r/min |
| Product net weight | 6.23 kg |
| Dimensions(mm) | 150x210x60 |
| Category | Specification |
|---|---|
| Brand | AMIGO NNU 4930 B/SPW33 | Interchangeable With: SKF NNU 4930 B/SPW33 |
| Bore diameter | 5.906 in |
| Outside diameter | 8.268 in |
| Width | 2.362 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 | 74,187 lbf |
| Basic static load rating | 147,250 lbf |
| Attainable speed for grease lubrication | 3800 r/min |
| Attainable speed for oil-air lubrication | 4300 r/min |
| Product net weight | 13.729 lb |
| Dimensions(in) | 5.906x8.268x2.362 |
Specifications Overview of the NNU 4930 B/SPW33 Bearings
| Category | Specification |
|---|---|
| Bore diameter | 150 mm |
| Outside diameter | 210 mm |
| Width | 60 mm |
| Shoulder diameter outer ring (NNU design) | 190.9 mm |
| Raceway diameter inner ring (NNU design) | 168.5 mm |
| Width annular lubrication groove at outer ring | 5.5 mm |
| Diameter lubrication hole (outer ring) | 3 mm |
| Chamfer dimension outer ring | min. 2 mm |
| Chamfer dimension inner ring (bearing with tapered bore) | min. 2 mm |
| Permissible axial displacement from the normal position of one bearing ring relative to the other (all) | max. 2 mm |
| Abutment diameter shaft | min. 160 mm |
| Abutment diameter shaft (NNU design) | max. 166 mm |
| Abutment diameter shaft (NNU design; not for tapered bore) | min. 172 mm |
| Abutment diameter housing | max. 200 mm |
| Fillet radius | max. 2 mm |
| Oil nozzle position (not for variants with TNHA cage) | dn 169.9 mm |
| Category | Specification |
|---|---|
| Bore diameter (d) | 5.906 in |
| Outside diameter (D) | 8.268 in |
| Width (B) | 2.362 in |
| Shoulder diameter outer ring (NNU design) (D1) | 7.516 in |
| Raceway diameter inner ring (NNU design) (F) | 6.634 in |
| Width annular lubrication groove at outer ring (b) | 0.217 in |
| Diameter lubrication hole (outer ring) (K) | 0.118 in |
| Chamfer dimension outer ring (r1,2) | min. 0.079 in |
| Chamfer dimension inner ring (bearing with tapered bore) (r3,4) | min. 0.079 in |
| Permissible axial displacement from the normal position of one bearing ring relative to the other (s) | max. 0.079 in |
| Abutment diameter shaft (da) | min. 6.299 in |
| Abutment diameter shaft (NNU design) (da) | max. 6.535 in |
| Abutment diameter shaft (NNU design; not for tapered bore) (db) | min. 6.772 in |
| Abutment diameter housing (Da) | max. 7.874 in |
| Fillet radius (ra) | max. 0.079 in |
| Oil nozzle position (dn) | 6.689 in |
Applicable Machines and Industries
The NNU 4930 B/SPW33 Double Row Cylindrical Roller Bearings are suitable for use in heavy-duty industrial machinery that requires high-load capacity and precision. Here are specific applications and the roles they play within these machines:
Machines and Roles:
- Steel Mills: These bearings are commonly used in continuous casting machines and rolling mills where they support high radial loads and axial displacement due to thermal expansion of the shafts.
- Wind Turbines: In wind turbines, they are used in the main rotor shafts and gearboxes to manage large radial loads and accommodate misalignment or deflection.
- Mining Equipment: They are used in conveyor belts, crushers, and vibrating screens where they handle heavy loads and shock conditions, helping to keep the equipment running smoothly without failure.
- Gearboxes: In heavy-duty gearboxes for industrial use, they help ensure smooth transmission of power while accommodating high-speed and heavy loads.
- Marine Propulsion Systems: These bearings are used in large marine engines to withstand axial and radial forces and contribute to the durability of the propulsion systems.
Bearing Cross Reference and Interchangeable Brands:
- SKF: SKF NNU 4930 B/SPW33
- FAG: FAG NNU4930-S-M-SP
- NSK: NSK NNU 4930 MBKR
- NTN: NTN NNU4930K
- Timken: Timken NNU4930-SW-M-SP
NNU 4930 B/SPW33 Bearing Cross Reference and Interchange
| Brand | Model |
|---|---|
| SKF | NNU 4930 B/SPW33 |
| Amigo | NNU 4930 B/SPW33 |
This table provides a clear overview of the key specifications and interchangeability for the NNU 4930 B/SPW33 Double Row Cylindrical Roller Bearing.
Choosing the Right Bearing
To enhance the webpage with a Product Comparison Module, the following table can be used to compare the Amigo NNU 4930 B/SPW33 Double Row Cylindrical Roller Bearings against other similar models. This will guide users in making more informed purchasing decisions by highlighting when and why to choose the Amigo model.
Key Advantages of Choosing Amigo NNU 4930 B/SPW33
Precision Performance: The Amigo NNU 4930 B/SPW33 Double Row Cylindrical Roller Bearings feature the same advanced load ratings as SKF, providing excellent dynamic and static performance. However, Amigo offers this at a more competitive price point.
Improved Durability: With a machined metal cage and premium bearing steel, Amigo provides excellent wear resistance, maintaining performance under challenging conditions, which is comparable to SKF but at a better value.
Higher Speed Rating: Amigo’s bearing has a higher limiting speed of 4300 r/min compared to the SKF and NSK counterparts, making it ideal for high-speed applications where operational efficiency is critical.
Relubrication Flexibility: Amigo bearings come with annular grooves and lubrication holes, offering enhanced lubrication access, which prolongs the life of the bearing even under heavy usage, a feature that is superior to the limited lubrication access of some competing models.
This module will provide users with a clear comparison, showing how Amigo bearings offer excellent value and performance. It also emphasizes situations in which selecting the Amigo NNU 4930 B/SPW33 Double Row Cylindrical Roller Bearing is the best choice for the customer.
| Feature | Amigo NNU 4930 B/SPW33 | SKF NNU 4930 B/SPW33 | NSK NNU 4930 K/SPW33 |
|---|---|---|---|
| Dynamic Load Rating | 330 kN | 330 kN | 320 kN |
| Static Load Rating | 655 kN | 655 kN | 640 kN |
| Speed Limit (Oil-Air Lubrication) | 4300 r/min | 4200 r/min | 4100 r/min |
| Material Quality | High-quality bearing steel | High-quality bearing steel | Standard-grade steel |
| Cage Material | Machined metal | Machined metal | Pressed steel |
| Weight | 6.11 kg | 6.20 kg | 6.10 kg |
| Sealing | Without | Without | Optional |
| Relubrication Feature | Annular groove and lubrication holes | Annular groove and lubrication holes | Limited lubrication access |
| Radial Internal Clearance | CN | CN | Standard |
| Price | Competitive | Higher | Medium |
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Why Amigo NNU 4930 B/SPW33 Bearings Are the Top Choice
"We have been using the Amigo NNU 4930 B/SPW33 bearings in our heavy-duty machinery for the past six months, and they have performed exceptionally well. The smoothness and reliability are on par with the SKF bearings we previously used, but at a more competitive price point. These bearings handle high loads and rotational speeds effortlessly, making them a perfect fit for our operations."
Nina Judith
"After switching to Amigo NNU 4930 B/SPW33 bearings, we noticed an immediate improvement in performance. The bearings run just as smoothly as the SKF counterparts, with excellent load-bearing capabilities. Installation was straightforward, and the bearings have shown incredible durability under constant use in our machinery."
Darcy Polly
"We recently replaced our SKF bearings with Amigo NNU 4930 B/SPW33 bearings in our industrial presses, and we couldn’t be happier. The quality is indistinguishable from other top-tier brands like NSK or SKF. These bearings offer high precision and a long service life, making them a cost-effective alternative that we’ll continue to use in the future."
Hunter Christian
"Amigo's NNU 4930 B/SPW33 bearings have exceeded our expectations in every way. They operate as smoothly and reliably as the SKF bearings we used to buy, with no drop in performance. The build quality is excellent, and they’ve handled our high-speed, high-load applications perfectly. We highly recommend these to anyone looking for top-notch bearings."
Patricia Bell
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