Cylindrical Roller Bearings
- Engineered for exceptional radial load capacity
- High-speed capability and low friction
- Featuring a separable design for reliable performance
- Optimized for demanding industrial systems, gearboxes, and electric motors
High Radial Load
Capacity
High Speed
Performance
Separable Design
Easy Maintenance
Up to P2 Level
Precision Grade
OEM / ODM
Custom Support
Fast Global
Response
What are Cylindrical Roller Bearings?
Optimized for Radial Loads
Mainly designed for carrying heavy radial loads, their internal geometry minimizes stress concentrations, ensuring durability under extreme pressure.
High-Speed Operation
The lower friction generated by the precise roller-to-raceway contact enables these bearings to operate efficiently at very high speeds with minimal heat generation.
Separable Structure
Many designs (like NU, NJ, NUP) feature separable inner or outer rings. This greatly simplifies mounting, dismounting, and maintenance in complex machinery.
Types of Cylindrical Roller Bearings
Single Row (NU, NJ, NUP, N)
The most common type. High radial load capacity and high speed. NU and N designs accommodate axial displacement, while NJ and NUP can take slight unidirectional or bidirectional axial loads.
Double Row (NN, NNU)
Features low cross-section, high load carrying capacity, and high stiffness. Extensively used in machine tool spindles and rolling mill stands where precision and rigidity are paramount.
Full Complement
Designed without a cage to incorporate the maximum number of rollers. Offers extremely high radial load capacity but operates at lower speeds compared to caged designs. Ideal for heavy lifting equipment.
Four-Row Bearings
Engineered specifically for rolling mill applications. They handle massive radial loads in confined spaces, providing exceptional durability in harsh steel manufacturing environments.
High-Precision (Up to P2)
Manufactured with stringent tolerances for minimal runout and superior rotational accuracy. Essential for high-speed machine tool spindles and advanced aerospace applications.
Customized & OEM
Non-standard dimensions, special clearances, advanced surface treatments, and custom cage materials designed exactly to your engineering drawings or application requirements.
Why Choose Our Cylindrical Roller Bearings?
High Radial Load Capacity
The line contact geometry distributes loads evenly across a larger surface area, preventing premature wear under heavy industrial stress.
Excellent Speed Performance
Precision-ground raceways and optimized cage designs reduce internal friction, allowing for reliable operation at high rotational speeds.
Strong Rigidity & Stability
Robust internal construction provides excellent stiffness, ensuring running stability even in applications subject to shock loads.
Easy Installation
Separable inner and outer rings allow for independent mounting, significantly reducing assembly time and maintenance costs.
Multiple Material Options
Available with steel, brass, or polyamide cages to suit different operating temperatures, lubrication conditions, and speeds.
Precision Grades up to P2
Our advanced manufacturing lines produce bearings with exceptional accuracy, meeting the strict demands of high-end machinery.
Applications of Cylindrical Roller Bearings
Industrial Gearboxes
Electric Motors
Pumps & Compressors
Wind Turbines
Mining Equipment
Steel & Rolling Mills
Machine Tool Spindles
Railway Systems
Technical Specifications
| Series | Bore (d) mm | Outer (D) mm | Width (B) mm | Dynamic Load (C) kN | Static Load (C0) kN | Limiting Speed (Grease) rpm |
|---|---|---|---|---|---|---|
| NU 205 ECP | 25 | 52 | 15 | 32.5 | 28.5 | 13,000 |
| NU 206 ECP | 30 | 62 | 16 | 44.0 | 39.0 | 11,000 |
| NU 308 ECM | 40 | 90 | 23 | 96.5 | 88.0 | 8,000 |
| NJ 210 ECP | 50 | 90 | 20 | 73.5 | 76.5 | 7,500 |
| NUP 312 ECM | 60 | 130 | 31 | 176.0 | 170.0 | 5,300 |
* Note: Custom dimensions, clearances (C2, C3, C4), and technical configurations are available upon request.
Materials & Customization
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Bearing Steel Options High-carbon chromium bearing steel (GCr15), stainless steel, or specialized alloys for extreme environments.
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Cage Materials Machined brass (M/MA/MB), stamped steel (J), or glass-fiber reinforced polyamide (P) cages available.
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Precision & Clearance Precision grades from standard P0 up to ultra-precise P2. Clearances adjustable (C2, Normal, C3, C4, C5).
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OEM & Non-Standard Services Private labeling, custom packaging, and full custom bearing development based on technical drawings or samples.
How to Choose the Right Cylindrical Roller Bearing
1. Analyze Load & Speed
Determine the primary radial load. For extreme loads at lower speeds, choose Full Complement. For high speeds, select caged Single Row designs.
2. Check Axial Displacement
If the shaft needs to expand thermally without stressing the bearing, NU or N designs allow free axial displacement within the bearing.
3. Determine Rigidity Needs
For machine tools where shaft deflection must be minimized, Double Row (NN/NNU) bearings offer superior radial stiffness.
| Bearing Type | Load Capacity | Speed Capability | Rigidity | Typical Applications |
|---|---|---|---|---|
| Single Row (Caged) | High | Excellent | Good | Electric motors, pumps, standard gearboxes |
| Double Row | Very High | Good | Excellent | Machine tool spindles, rolling mills |
| Full Complement | Maximum | Low to Moderate | High | Cranes, material handling, heavy lifting |
| Four-Row | Extreme | Low | Very High | Steel mill roll necks, heavy mining |
Quality Control and Manufacturing Assurance
We implement strict inspection procedures from raw materials to finished products. Our commitment to stable and reliable quality is backed by advanced testing equipment and export-oriented standards.
- 100% Raw Material Metallurgical Inspection
- Micro-level Dimensional & Precision Grinding Verification
- Strict Vibration and Noise Control Testing
- Durability and Accelerated Life Testing
- ISO Certified Quality Management System
Frequently Asked Questions
They are primarily used in applications requiring high radial load capacity and high-speed operation. Common uses include industrial gearboxes, electric motors, machine tool spindles, pumps, compressors, and railway vehicles.
NU: Has two flanges on the outer ring and none on the inner ring. It allows axial displacement in both directions.
NJ: Has two flanges on the outer ring and one on the inner ring, allowing axial location in one direction.
NUP: Has two flanges on the outer ring, one fixed flange on the inner ring, and a loose flange ring, allowing fixed axial location in both directions.
Standard NU and N types cannot carry axial loads. However, designs with flanges on both the inner and outer rings (like NJ and NUP) can support light to moderate axial loads in addition to heavy radial loads.
Caged bearings contain a cage that separates the rollers, reducing friction and allowing for very high rotational speeds. Full complement bearings have no cage and are packed entirely with rollers, maximizing load capacity but limiting the maximum operating speed.
Yes, with our large-scale production capacity, we fully support OEM branding, custom packaging, and private label manufacturing for bulk wholesale and distributor orders.
To expedite your quote, please provide the bearing model number (e.g., NU 205 ECP), dimensions (ID x OD x Width), required quantity, precision grade, cage material preference, and any specific application details or custom requirements.