Cylindrical Roller Radial Bearings – Two-Row

**TIMKEN Cylindrical Roller Bearings: Engineered for High Performance and Reliability**

TIMKEN cylindrical roller bearings are precision-engineered solutions designed to deliver exceptional radial load capacity, durability, and efficiency in demanding industrial and automotive applications. As a leader in mechanical power transmission and bearing technology, TIMKEN has perfected the design of these bearings to meet the rigorous demands of heavy machinery, high-speed equipment, and precision systems.

### **Technical Features & Design Advantages**
TIMKEN cylindrical roller radial bearings feature a robust construction with cylindrical rollers guided by high-strength cages, ensuring optimal load distribution and reduced friction. Key design elements include:

– **High Radial Load Capacity:** The line-contact design between rollers and raceways maximizes load-bearing efficiency, making these bearings ideal for applications with heavy radial loads.
– **Precision Engineering:** Tight tolerances and superior surface finishes minimize vibration and noise, enhancing performance in precision equipment such as machine tools and gearboxes.
– **Enhanced Cage Designs:** Options include brass, steel, or polymer cages to accommodate high speeds, extreme temperatures, or corrosive environments.
– **Interchangeability & Configurations:** Available in single-row, double-row, and multi-row designs, with separable or non-separable inner/outer rings for easier installation and maintenance.
– **Specialized Coatings & Materials:** Advanced heat treatment processes and corrosion-resistant coatings extend service life in harsh conditions, such as mining or marine environments.

### **Performance Benefits**
TIMKEN cylindrical roller bearings outperform competitors by delivering:
– **Extended Service Life:** Reduced wear and optimized lubrication retention lower maintenance frequency.
– **High-Speed Capability:** Precision-balanced components minimize heat generation, allowing stable operation at elevated RPMs.
– **Energy Efficiency:** Low friction design reduces power consumption, contributing to sustainable operations.
– **Versatility:** Customizable bore sizes, seals, and lubrication options ensure compatibility with diverse applications.

### **Typical Applications**
These bearings are widely used across industries, including:
– **Industrial Machinery:** Gearboxes, pumps, compressors, and conveyor systems requiring high radial stiffness.
– **Automotive Systems:** Wheel hubs, transmissions, and electric vehicle drivetrains demanding durability and efficiency.
– **Precision Equipment:** CNC spindles, printing presses, and robotics where accuracy and smooth operation are critical.

TIMKEN’s cylindrical roller bearings represent a blend of innovation and reliability, ensuring optimal performance even in the most challenging environments. By leveraging advanced materials and precision manufacturing, TIMKEN continues to set the standard for mechanical power transmission solutions worldwide.

For engineers and maintenance professionals seeking dependable, high-performance bearings, TIMKEN cylindrical roller bearings offer a proven solution for maximizing uptime and operational efficiency.

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Part Number Bore d O.D.D Width B DUR/DOR F/E Static Load Rating Co Dynamic Load Rating C1 Thermal Speed Ratings - Oil Thermal Speed Ratings - Grease
NNU4148MAW33
240 mm
400 mm
160 mm
282 mm
3680000 N
2290000 N
870 rpm
800 rpm
NNU4076MAW33
380 mm
560 mm
180 mm
425 mm
5860000 N
3260000 N
530 rpm
480 rpm
NNU4952MAW33
260 mm
360 mm
100 mm
292 mm
1710000 N
856000 N
1100 rpm
950 rpm
NNU4176MAW33
380 mm
620 mm
243 mm
442 mm
8520000 N
4990000 N
460 rpm
430 rpm
NNU4152MAW33
260 mm
440 mm
180 mm
306 mm
4540000 N
2840000 N
760 rpm
710 rpm
NNU4980MAW33
400 mm
540 mm
140 mm
446 mm
3920000 N
1710000 N
600 rpm
530 rpm
NNU4956MAW33
280 mm
380 mm
100 mm
312 mm
1834000 N
880000 N
1000 rpm
880 rpm
NNU4080MAW33
400 mm
600 mm
200 mm
449 mm
7210000 N
3970000 N
460 rpm
430 rpm
NNU4156MAW33
280 mm
460 mm
180 mm
326 mm
4820000 N
2940000 N
990 rpm
910 rpm
NNU4180MAW33
400 mm
650 mm
250 mm
463 mm
9460000 N
5530000 N
410 rpm
390 rpm