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
NNU4964MAW33
320.000 mm
440 mm
118 mm
359 mm
2660000 N
1270000 N
790 rpm
710 rpm
NNU4184MAW33
420 mm
700 mm
280 mm
497 mm
11420000 N
6430000 N
370 rpm
350 rpm
NNU4934MAW33
170 mm
230 mm
60 mm
188.5 mm
696000 N
376000 N
1900 rpm
1600 rpm
NNU4164MAW33
320.000 mm
540 mm
218 mm
375 mm
6280000 N
3940000 N
590 rpm
550 rpm
NNU4988MAW33
440 mm
600 mm
160 mm
490 mm
5740000 N
2500000 N
460 rpm
420 rpm
NNU4936MAW33
180 mm
250 mm
69 mm
202 mm
850000 N
449000 N
1700 rpm
1500 rpm
NNU4968MAW33
340.000 mm
460 mm
118 mm
379 mm
2660000 N
1250000 N
760 rpm
670 rpm
NNU4088MAW33
440 mm
650 mm
212 mm
487 mm
8180000 N
4530000 N
410 rpm
380 rpm
NNU4938MAW33
190 mm
260 mm
69 mm
212 mm
890000 N
459000 N
1600 rpm
1400 rpm
NNU4068MAW33
340.000 mm
520 mm
180 mm
385 mm
5130000 N
2980000 N
610 rpm
560 rpm
NNU4188MAW33
440 mm
720 mm
280 mm
511 mm
11400000 N
6620000 N
370 rpm
340 rpm
NNU4940MAW33
200 mm
280 mm
80 mm
225 mm
1046000 N
550000 N
1500 rpm
1300 rpm
NNU4168MAW33
340.000 mm
580 mm
243 mm
402 mm
7580000 N
4660000 N
530 rpm
490 rpm
NNU4992MAW33
460 mm
620 mm
160 mm
510 mm
5540000 N
2420000 N
460 rpm
420 rpm
NNU4140MAW33
200 mm
340 mm
140 mm
235 mm
2460000 N
1690000 N
1200 rpm
1100 rpm
NNU4972MAW33
360.000 mm
480 mm
118 mm
399 mm
2800000 N
1270000 N
710 rpm
630 rpm
NNU4092MAW33
460 mm
680 mm
218 mm
513 mm
9420000 N
4980000 N
370 rpm
340 rpm
NNU4944MAW33
220 mm
300 mm
80 mm
245 mm
1150000 N
577000 N
1400 rpm
1200 rpm
NNU4072MAW33
360.000 mm
540 mm
180 mm
405 mm
5580000 N
3180000 N
560 rpm
510 rpm
NNU4192MAW33
460 mm
760 mm
300 mm
537 mm
12960000 N
7440000 N
330 rpm
320 rpm
NNU4144MAW33
220 mm
370 mm
150 mm
258 mm
2960000 N
1930000 N
1000 rpm
940 rpm
NNU4172MAW33
360.000 mm
600 mm
243 mm
422 mm
8480000 N
5000000 N
470 rpm
440 rpm
NNU4948MAW33
240 mm
320 mm
80 mm
265 mm
1220000 N
591000 N
1200 rpm
1100 rpm
NNU4976MAW33
380 mm
520 mm
140 mm
426 mm
3720000 N
1660000 N
630 rpm
560 rpm