Double Row Tapered Roller Bearing

**NTN Tapered Roller Bearings: Precision, Durability, and High-Performance Solutions for Demanding Applications**

NTN is a globally recognized leader in the design and manufacturing of high-performance rolling bearings, with its tapered roller bearings standing out for their exceptional load capacity, precision, and reliability. Among NTN’s extensive bearing portfolio, the **Metric ISO Series Tapered Roller Bearings** and **Double Row Tapered Roller Bearings** are engineered to deliver superior performance in the most demanding industrial, automotive, and precision equipment applications. These bearings are designed to handle combined radial and axial loads efficiently, making them indispensable in systems where durability, high-speed operation, and long service life are critical.

### **Technical Features and Performance Advantages**

NTN’s **Metric ISO Series Tapered Roller Bearings** adhere to international dimensional standards (ISO 355), ensuring seamless compatibility with a wide range of machinery. Their precision-ground rollers and raceways are optimized for smooth rolling motion, reducing friction and heat generation. Key features include:

– **High Load Capacity**: The tapered geometry allows for effective distribution of radial and axial loads, making these bearings ideal for heavy-duty applications.
– **Enhanced Rigidity and Alignment**: The cup-and-cone design ensures stable operation even under misalignment conditions, improving overall system reliability.
– **Superior Lubrication Retention**: Advanced sealing options and optimized internal geometries help maintain lubrication, extending bearing life in harsh environments.
– **Interchangeability**: Conforming to ISO standards, these bearings offer easy replacement and integration into existing systems.

For applications requiring even greater load support and rigidity, NTN’s **Double Row Tapered Roller Bearings** provide an exceptional solution. These bearings incorporate two rows of tapered rollers, significantly increasing radial and axial load capacity while maintaining compact dimensions. Their design minimizes deflection under heavy loads, making them ideal for high-stress applications such as gearboxes, heavy machinery, and large industrial equipment.

### **Typical Applications**

NTN’s tapered roller bearings are widely used across multiple industries, including:

– **Industrial Machinery**: Machine tools, construction equipment, mining machinery, and conveyor systems benefit from their high load capacity and resistance to shock loads.
– **Automotive Systems**: Wheel hubs, transmissions, and differentials rely on these bearings for their ability to handle dynamic forces and high rotational speeds.
– **Precision Equipment**: Gear reducers, pumps, and wind turbine systems utilize NTN’s tapered roller bearings for their precision and long-term reliability.

By combining advanced materials, precision engineering, and rigorous quality control, NTN ensures that its tapered roller bearings meet the highest performance standards. Whether in heavy industrial applications or high-speed automotive systems, NTN’s Metric ISO Series and Double Row Tapered Roller Bearings deliver unmatched durability, efficiency, and operational excellence.

For demanding environments where performance cannot be compromised, NTN’s tapered roller bearings provide the strength, precision, and reliability needed to keep machinery running smoothly—ensuring reduced downtime and lower total cost of ownership.

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Part Number d D C B1 r Mass
430317X
85.000 mm
180.000 mm
77.000 mm
98.000 mm
4.000 mm
11.200 kg
430318
90.000 mm
190.000 mm
81.000 mm
102.000 mm
4.000 mm
12.500 kg
430318D
90.000 mm
190.000 mm
69.000 mm
102.000 mm
4.000 mm
12.500 kg
430319X
95.000 mm
200.000 mm
85.000 mm
108.000 mm
4.000 mm
14.700 kg
430320X
100.000 mm
215.000 mm
87.000 mm
112.000 mm
4.000 mm
16.880 kg
430312DX
60.000 mm
130.000 mm
51.000 mm
74.000 mm
3.000 mm
4.220 kg
430236
180.000 mm
320.000 mm
99.000 mm
127.000 mm
5.000 mm
39.400 kg
430312U
60.000 mm
130.000 mm
59.000 mm
74.000 mm
3.000 mm
4.400 kg
430238
190.000 mm
340.000 mm
105.000 mm
133.000 mm
5.000 mm
45.400 kg
430313DX
65.000 mm
140.000 mm
53.000 mm
79.000 mm
3.000 mm
5.320 kg
430240
200.000 mm
360.000 mm
110.000 mm
142.000 mm
5.000 mm
62.800 kg
430313X
65.000 mm
140.000 mm
63.000 mm
79.000 mm
3.000 mm
5.320 kg
430244C3
220.000 mm
400.000 mm
122.000 mm
158.000 mm
4.000 mm
76.300 kg
430314DX
70.000 mm
150.000 mm
57.000 mm
83.000 mm
3.000 mm
6.230 kg
430244CS550
220.000 mm
400.000 mm
122.000 mm
158.000 mm
4.000 mm
68.000 kg
430308
40.000 mm
90.000 mm
45.500 mm
56.000 mm
2.000 mm
1.610 kg
430308DX
40.000 mm
90.000 mm
39.500 mm
56.000 mm
2.000 mm
1.560 kg
430308U
40.000 mm
90.000 mm
45.500 mm
56.000 mm
2.000 mm
1.610 kg
430309
45.000 mm
100.000 mm
49.500 mm
60.000 mm
2.000 mm
2.110 kg
430309DX
45.000 mm
100.000 mm
41.500 mm
60.000 mm
2.000 mm
2.110 kg