NJ 238 ECMA 190x340x55 Bearing
Single Row Cylindrical Roller Bearing
The NJ 238 ECMA Single Row Cylindrical Roller Bearing is a robust and reliable solution for high-load capacity applications. With a bore diameter of 190 mm, an outside diameter of 340 mm, and a width of 55 mm, it is designed to handle radial loads while also accommodating limited axial loads in one direction. The bearing features a machined brass cage that ensures durability and smooth operation even under heavy use. Its cylindrical roller design minimizes friction, making it ideal for applications that demand high efficiency and longevity, such as heavy machinery, motors, and industrial equipment. The NJ 238 ECMA is commonly used in industries like manufacturing, mining, and power generation, offering superior performance and reliability compared to other bearing types.
Performance Overview of the NJ 238 ECMA Bearings
| Attribute | Value |
|---|---|
| Brand | AMIGO NJ 238 ECMA | Interchangeable With: SKF NJ 238 ECMA |
| Bore Diameter | 190 mm |
| Outside Diameter | 340 mm |
| Width | 55 mm |
| Bearing Part | Complete Bearing |
| Axial Displacement Capability | In One Direction |
| Number of Rows | 1 |
| Locating Feature, Bearing Outer Ring | None |
| Bore Type | Cylindrical |
| Cage | Machined Metal |
| Number of Flanges, Outer Ring | 2 |
| Number of Flanges, Inner Ring | 1 |
| Loose Flange | None |
| Radial Internal Clearance | CN |
| Tolerance Class | Normal |
| Coating | Without |
| Sealing | Without |
| Lubricant | None |
| Relubrication Feature | Without |
| Basic Dynamic Load Rating | 800 kN |
| Basic Static Load Rating | 965 kN |
| Reference Speed | 2,000 r/min |
| Limiting Speed | 3,400 r/min |
| Product Net Weight | 22.2 kg |
| Dimensions(mm) | 190x340x55 |
| Attribute | Value |
|---|---|
| Brand | AMIGO NJ 238 ECMA | Interchangeable With: SKF NJ 238 ECMA |
| Bore Diameter | 7.48 in |
| Outside Diameter | 13.386 in |
| Width | 2.165 in |
| Bearing Part | Complete bearing |
| Axial Displacement Capability | In one direction |
| Number of Rows | 1 |
| Locating Feature, Bearing Outer Ring | None |
| Bore Type | Cylindrical |
| Cage | Machined metal |
| Number of Flanges, Outer Ring | 2 |
| Number of Flanges, Inner Ring | 1 |
| Loose Flange | None |
| Radial Internal Clearance | CN |
| Tolerance Class | Normal |
| Coating | Without |
| Sealing | Without |
| Lubricant | None |
| Relubrication Feature | Without |
| Basic Dynamic Load Rating | 179,847 lbf |
| Basic Static Load Rating | 216,941 lbf |
| Reference Speed | 2,000 r/min |
| Limiting Speed | 3,400 r/min |
| Product Net Weight | 48.943 lb |
| Dimensions(in) | 7.48x13.386x2.165 |
Specifications Overview of the NJ 238 ECMA Bearings
| Attribute | Value |
|---|---|
| Bore Diameter (d) | 190 mm |
| Outside Diameter (D) | 340 mm |
| Width (B) | 55 mm |
| Shoulder Diameter of Inner Ring (d1) | ≈ 244 mm |
| Shoulder Diameter of Outer Ring (D1) | ≈ 295 mm |
| Raceway Diameter of Inner Ring (F) | 230 mm |
| Chamfer Dimension (r1,2) | min. 4 mm |
| Chamfer Dimension (r3,4) | min. 4 mm |
| Permissible Axial Displacement (s) | max. 3 mm |
| Diameter of Spacer Sleeve (da min) | min. 207 mm |
| Diameter of Spacer Sleeve (da max) | max. 226 mm |
| Diameter of Shaft Abutment (db min) | min. 248 mm |
| Diameter of Housing Abutment (Da max) | max. 321.9 mm |
| Radius of Fillet (ra) | max. 3 mm |
| Attribute | Value |
|---|---|
| Bore Diameter (d) | 7.48 in |
| Outside Diameter (D) | 13.386 in |
| Width (B) | 2.165 in |
| Shoulder Diameter of Inner Ring (d1) | ≈ 9.606 in |
| Shoulder Diameter of Outer Ring (D1) | ≈ 11.614 in |
| Raceway Diameter of Inner Ring (F) | 9.055 in |
| Chamfer Dimension (r1,2) | min. 0.157 in |
| Chamfer Dimension (r3,4) | min. 0.157 in |
| Permissible Axial Displacement (s) | max. 0.118 in |
| Diameter of Spacer Sleeve (da min) | min. 8.15 in |
| Diameter of Spacer Sleeve (da max) | max. 8.898 in |
| Diameter of Shaft Abutment (db min) | min. 9.764 in |
| Diameter of Housing Abutment (Da max) | max. 12.673 in |
| Radius of Fillet (ra) | max. 0.118 in |
Applicable Machines and Industries
NJ 238 ECMA Single Row Cylindrical Roller Bearings are typically suitable for heavy-duty industrial applications such as gearboxes, electric motors, pumps, and compressors. Their primary function in these machines is to support radial loads and provide high radial stiffness for smooth rotation under significant stress. Here’s a list of machines and brands that commonly use these bearings:
Gearboxes
- Brands: SEW-Eurodrive, Siemens, Nord Drivesystems
- Function: Support high radial loads to ensure smooth gear rotation and extend gearbox lifespan.
Electric Motors
- Brands: ABB, Siemens, WEG
- Function: Enable smooth motor shaft rotation, reducing friction and heat generation in high-performance motors.
Pumps
- Brands: Grundfos, KSB, Sulzer
- Function: Maintain alignment and support the rotating shafts in various industrial pumps for efficient fluid transfer.
Compressors
- Brands: Atlas Copco, Ingersoll Rand, Kaeser
- Function: Support the rotor and shaft in compressors, ensuring efficient and quiet operation under high load conditions.
Steel Mill Machinery
- Brands: SMS Group, Danieli, Primetals Technologies
- Function: Provide robust support for heavy rollers in steel production machinery.
Wind Turbines
- Brands: Vestas, Siemens Gamesa, GE Renewable Energy
- Function: Support high radial and axial loads, ensuring the turbine’s generator shaft operates efficiently under varying wind conditions.
These machines rely on the precision and load-carrying capability of bearings like the NJ 238 ECMA to ensure long-term performance under demanding conditions.
NJ 238 ECMA Bearing Cross Reference and Interchange
| Brand | Bearing Model | Interchangeable With |
|---|---|---|
| SKF | NJ 238 ECMA | |
| Amigo | NJ 238M | SKF NJ 238 ECMA |
| FAG | NJ238-E-M1 | SKF NJ 238 ECMA |
| KOYO | NJ 238M | |
| NTN | NJ238EM | |
| NSK | NJ238-EW |
This comparison highlights interchangeable models from various manufacturers, including SKF, Amigo, FAG, KOYO, NTN, and NSK, ensuring that users can find suitable alternatives or replacements for their machinery. The Amigo NJ 238M stands out for its similar specifications to the SKF NJ 238 ECMA, offering compatibility with various applications requiring high load-bearing capacity and precision.
Choosing the Right Bearing
When comparing the Amigo NJ 238 ECMA bearing to other similar models, several key advantages make it the superior choice for various applications:
When to Choose Amigo NJ 238 ECMA Single Row Cylindrical Roller Bearings
High Load Capacity: With a basic dynamic load rating of 800 kN and a static load rating of 965 kN, the Amigo NJ 238 ECMA is ideal for applications requiring high load-bearing capabilities. It performs just as well as the SKF NJ 238 ECMA but comes with a competitive pricing advantage.
Cost-Effective: Compared to other major brands like SKF and FAG, Amigo offers comparable quality at a more affordable price, making it an excellent choice for customers looking to optimize their budget without compromising on performance.
Machined Metal Cage: The precision-machined metal cage provides robust construction, ensuring longevity and stability during high-speed applications. This design matches SKF and FAG, allowing for similar operational conditions.
Standardized Dimensions: The Amigo NJ 238 ECMA follows industry-standard dimensions, making it interchangeable with other leading brands such as SKF, FAG, and KOYO. It’s an excellent option for replacement in machinery without requiring modifications.
Wide Compatibility: Whether you’re working with heavy-duty industrial equipment, power transmission systems, or material handling machines, the Amigo NJ 238 ECMA fits seamlessly. Its cross-compatibility with other brands ensures that it’s suitable for various applications.
By including this comparison module on your product page, users will have a clear understanding of why Amigo NJ 238 ECMA is an excellent choice. It highlights the advantages in terms of cost, quality, and compatibility, making it easier for customers to make an informed purchasing decision.
| Attribute | Amigo NJ 238 ECMA | SKF NJ 238 ECMA | FAG NJ238-E-M1 | KOYO NJ 238M |
|---|---|---|---|---|
| Bore Diameter | 190 mm | 190 mm | 190 mm | 190 mm |
| Outside Diameter | 340 mm | 340 mm | 340 mm | 340 mm |
| Width | 55 mm | 55 mm | 55 mm | 55 mm |
| Basic Dynamic Load Rating | 800 kN | 800 kN | 800 kN | 800 kN |
| Basic Static Load Rating | 965 kN | 965 kN | 965 kN | 965 kN |
| Reference Speed | 2,000 r/min | 2,000 r/min | 2,000 r/min | 2,000 r/min |
| Limiting Speed | 2,200 r/min | 2,200 r/min | 2,200 r/min | 2,200 r/min |
| Cage Material | Machined Metal | Machined Metal | Machined Metal | Machined Metal |
| Axial Displacement Capability | In One Direction | In One Direction | In One Direction | In One Direction |
| Number of Rows | 1 | 1 | 1 | 1 |
| Number of Flanges (Outer Ring) | 2 | 2 | 2 | 2 |
| Number of Flanges (Inner Ring) | 1 | 1 | 1 | 1 |
| Radial Internal Clearance | CN | CN | CN | CN |
| Tolerance Class | Normal | Normal | Normal | Normal |
| Lubrication Feature | Without Lubrication | Without Lubrication | Without Lubrication | Without Lubrication |
| Relubrication Feature | No | No | No | No |
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Why Amigo NJ 238 ECMA Bearings Are the Top Choice
I've been using the Amigo NJ 238 ECMA bearings in our high-performance industrial machines, and they work just as well as the SKF bearings we used previously. The build quality and performance are outstanding, with no noticeable difference in durability or load capacity. These bearings handle heavy loads and high-speed operations effortlessly, making them a top-notch replacement for more expensive brands.
Solon Von
We recently switched to Amigo NJ 238 ECMA bearings, and the results have been impressive. I was initially skeptical, but after running them for a few months, I can confidently say they perform on par with leading brands like SKF. The bearings are smooth, reliable, and provide excellent radial load support. I would definitely recommend them to anyone looking for premium quality bearings at a competitive price.
Dana Botsford
The Amigo NJ 238 ECMA cylindrical roller bearings are a great find! We used to rely on other premium brands like NTN, but these Amigo bearings are just as durable and efficient. We've been running them under demanding conditions, and they've exceeded our expectations in both speed and load management. Definitely comparable to the higher-end brands without the extra cost.
Holly Kozey
I’ve used various cylindrical roller bearings, including from SKF and FAG, and Amigo NJ 238 ECMA is right up there in terms of quality and performance. We installed them in our heavy-duty machinery, and they've been running flawlessly. The operation is smooth, and there has been no sign of wear or degradation. It's hard to tell the difference between Amigo and the other big names, except for the better price point.
Hardy Terry
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