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
NNU4188MAW33
440 mm
720 mm
280 mm
511 mm
11400000 N
6620000 N
370 rpm
340 rpm
NNU4992MAW33
460 mm
620 mm
160 mm
510 mm
5540000 N
2420000 N
460 rpm
420 rpm
NNU4092MAW33
460 mm
680 mm
218 mm
513 mm
9420000 N
4980000 N
370 rpm
340 rpm
NNU4192MAW33
460 mm
760 mm
300 mm
537 mm
12960000 N
7440000 N
330 rpm
320 rpm
NNU4080MAW33
400 mm
600 mm
200 mm
449 mm
7210000 N
3970000 N
460 rpm
430 rpm
NNU4960MAW33
300 mm
420 mm
118 mm
339 mm
2380000 N
1170000 N
880 rpm
780 rpm
NNU4932MAW33
160 mm
220 mm
60 mm
178.5 mm
692000 N
380000 N
2000 rpm
1700 rpm
NNU4934MAW33
170 mm
230 mm
60 mm
188.5 mm
696000 N
376000 N
1900 rpm
1600 rpm
NNU4936MAW33
180 mm
250 mm
69 mm
202 mm
850000 N
449000 N
1700 rpm
1500 rpm
NNU4938MAW33
190 mm
260 mm
69 mm
212 mm
890000 N
459000 N
1600 rpm
1400 rpm
NNU4940MAW33
200 mm
280 mm
80 mm
225 mm
1046000 N
550000 N
1500 rpm
1300 rpm
NNU4140MAW33
200 mm
340 mm
140 mm
235 mm
2460000 N
1690000 N
1200 rpm
1100 rpm
NNU4944MAW33
220 mm
300 mm
80 mm
245 mm
1150000 N
577000 N
1400 rpm
1200 rpm
NNU4144MAW33
220 mm
370 mm
150 mm
258 mm
2960000 N
1930000 N
1000 rpm
940 rpm
NNU4948MAW33
240 mm
320 mm
80 mm
265 mm
1220000 N
591000 N
1200 rpm
1100 rpm
NNU4148MAW33
240 mm
400 mm
160 mm
282 mm
3680000 N
2290000 N
870 rpm
800 rpm
NNU4952MAW33
260 mm
360 mm
100 mm
292 mm
1710000 N
856000 N
1100 rpm
950 rpm
NNU4152MAW33
260 mm
440 mm
180 mm
306 mm
4540000 N
2840000 N
760 rpm
710 rpm
NNU4956MAW33
280 mm
380 mm
100 mm
312 mm
1834000 N
880000 N
1000 rpm
880 rpm
NNU4156MAW33
280 mm
460 mm
180 mm
326 mm
4820000 N
2940000 N
990 rpm
910 rpm
NNU4930MAW33
150 mm
210 mm
60 mm
168.5 mm
668000 N
374000 N
2100 rpm
1800 rpm
NNU4160MAW33
300 mm
500 mm
200 mm
351 mm
6140000 N
3780000 N
600 rpm
560 rpm
NNU4964MAW33
320.000 mm
440 mm
118 mm
359 mm
2660000 N
1270000 N
790 rpm
710 rpm
NNU4164MAW33
320.000 mm
540 mm
218 mm
375 mm
6280000 N
3940000 N
590 rpm
550 rpm