Double Row Cylindrical Roller Bearing

**NTN Double Row Cylindrical Roller Bearings: Engineered for Heavy Loads and Precision Performance**

NTN Corporation, a global leader in bearing technology, offers high-performance **Double Row Cylindrical Roller Bearings** designed to deliver exceptional load capacity, rigidity, and operational reliability in demanding industrial and automotive applications. These bearings are engineered to accommodate heavy radial loads while maintaining precise alignment, making them ideal for machinery and systems where durability and accuracy are critical.

### **Technical Features & Design Advantages**
NTN’s **Double Row Cylindrical Roller Bearings** feature a robust construction with two rows of precision-ground cylindrical rollers, guided by high-strength cages. Key design elements include:

– **High Radial Load Capacity**: The double-row arrangement distributes loads evenly across both rows, significantly enhancing bearing life under heavy radial forces.
– **Optimized Roller Geometry**: NTN’s advanced profiling reduces edge stress, minimizing friction and wear even under misalignment or high-speed conditions.
– **Enhanced Rigidity & Stability**: The bearings’ rigid structure prevents deflection, ensuring consistent performance in precision equipment and heavy machinery.
– **Versatile Cage Options**: Available with pressed steel or machined brass cages for improved strength and heat resistance in high-speed applications.
– **Sealing & Lubrication Options**: Customizable sealing solutions (such as contact or non-contact seals) and pre-greased configurations extend service intervals in harsh environments.

### **Performance Advantages**
NTN’s double-row cylindrical roller bearings outperform single-row designs by offering:

– **Higher Load Ratings**: Capable of handling extreme radial loads in a compact footprint, reducing the need for larger bearing assemblies.
– **Improved Running Accuracy**: Precision manufacturing ensures smooth rotation with minimal vibration, critical for machine tools and gearboxes.
– **Long Service Life**: Advanced heat treatment and surface finishing technologies enhance fatigue resistance, reducing maintenance downtime.
– **Adaptability**: Suitable for both fixed and floating bearing arrangements, accommodating thermal expansion in shaft systems.

### **Typical Applications**
These bearings are widely used in industries requiring robust, high-precision rotation, including:

– **Industrial Machinery**: Gearboxes, rolling mills, printing presses, and large pumps.
– **Automotive Systems**: Heavy-duty transmissions, axle systems, and electric vehicle drivetrains.
– **Precision Equipment**: Machine tool spindles, robotics, and wind turbine pitch/yaw systems.

By combining superior engineering with rigorous quality control, NTN’s **Double Row Cylindrical Roller Bearings** provide unmatched performance in the most challenging operating conditions. Whether in high-speed industrial equipment or heavy-load automotive applications, these bearings ensure reliability, efficiency, and extended operational life.

For applications demanding durability, precision, and load resilience, NTN’s advanced bearing solutions stand as a trusted choice for engineers worldwide.

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Part Number d D B r Mass
NN3926KD1XC0NAUP
130.000 mm
180.000 mm
37.000 mm
1.500 mm
2.694 kg
NN3936KUPV2
180.000 mm
250.000 mm
52.000 mm
2.000 mm
7.400 kg
NN3948KC9NAP4
240.000 mm
320.000 mm
60.000 mm
2.100 mm
12.900 kg
NN3952KC9NAP4
260.000 mm
360.000 mm
75.000 mm
2.100 mm
22.200 kg
NN3956KC9NAUP-1
280.000 mm
380.000 mm
75.000 mm
2.100 mm
23.846 kg
NN4920
100.000 mm
140.000 mm
40.000 mm
1.100 mm
NN4920K
100.000 mm
140.000 mm
40.000 mm
1.100 mm
NN4920KCS15UP-4
100.000 mm
140.000 mm
40.000 mm
1.100 mm
1.842 kg
NN4920KNAP4
100.000 mm
140.000 mm
40.000 mm
1.100 mm
NN4921
105.000 mm
145.000 mm
40.000 mm
1.100 mm
NN3040KC1NAP5
200.000 mm
310.000 mm
82.000 mm
2.100 mm
22.200 kg
NN3040KNAP4
200.000 mm
310.000 mm
82.000 mm
2.100 mm
NN3044
220.000 mm
340.000 mm
90.000 mm
3.000 mm
29.900 kg
NN3044K
220.000 mm
340.000 mm
90.000 mm
3.000 mm
NN3048
240.000 mm
360.000 mm
92.000 mm
3.000 mm
32.800 kg
NN3048K
240.000 mm
360.000 mm
92.000 mm
3.000 mm
NN3048KC9NAP4
240.000 mm
360.000 mm
92.000 mm
3.000 mm
32.667 kg
NN3052
260.000 mm
400.000 mm
104.000 mm
4.000 mm
NN3052K
260.000 mm
400.000 mm
104.000 mm
4.000 mm
NN3052KD1C1NAP5
260.000 mm
400.000 mm
104.000 mm
4.000 mm
45.800 kg
NN3056
280.000 mm
420.000 mm
106.000 mm
4.000 mm
51.100 kg
NN3056K
280.000 mm
420.000 mm
106.000 mm
4.000 mm
NN3060
300.000 mm
460.000 mm
118.000 mm
4.000 mm
70.800 kg
NN3060K
300.000 mm
460.000 mm
118.000 mm
4.000 mm
69.240 kg