Tapered Roller Set – Metric Series

**NTN Tapered Roller Bearings – Metric ISO Series: Precision, Durability, and High-Performance Load Handling**

NTN’s **Metric ISO Series Tapered Roller Bearings** and **Tapered Roller Sets** represent a pinnacle of engineering excellence, designed to deliver unmatched reliability in demanding industrial and automotive applications. These bearings are meticulously crafted to handle combined radial and axial loads with superior efficiency, making them indispensable for heavy-duty machinery, precision equipment, and high-performance automotive systems.

### **Technical Features & Design Advantages**
NTN’s tapered roller bearings are manufactured to **ISO metric standards**, ensuring global compatibility and seamless integration into a wide range of machinery. Key design features include:

– **Optimized Roller & Raceway Geometry**: Precision-ground tapered rollers and raceways minimize friction while distributing loads evenly, enhancing bearing life and reducing wear.
– **High-Grade Materials**: Constructed from premium **case-hardened chromium steel**, these bearings offer exceptional resistance to fatigue, shock loads, and harsh operating conditions.
– **Advanced Cage Designs**: Options include **pressed steel cages** (for high-speed stability) and **machined brass cages** (for extreme-load applications), ensuring optimal roller guidance and lubrication retention.
– **Sealing & Lubrication Options**: Configurable with **contact or non-contact seals**, as well as specialized grease formulations for extended service intervals in contaminated environments.

### **Performance Benefits**
NTN’s tapered roller bearings excel in applications requiring **rigidity, high load capacity, and precise alignment**:

– **Superior Load Handling**: The tapered design efficiently manages **combined radial and thrust loads**, making them ideal for gearboxes, wheel hubs, and heavy industrial equipment.
– **Extended Service Life**: Reduced internal sliding friction and optimized heat dissipation contribute to **longer operational lifespans**, even under continuous high-stress conditions.
– **Enhanced Operational Efficiency**: Precision manufacturing ensures **low noise and vibration**, critical for automotive drivetrains, wind turbines, and precision machine tools.

### **Typical Applications**
These bearings are widely used across industries where **durability and precision** are non-negotiable:

– **Automotive Systems**: Wheel bearings, differential assemblies, and transmission systems in passenger vehicles, trucks, and off-road machinery.
– **Industrial Machinery**: Conveyors, mining equipment, construction machinery, and agricultural gearboxes subjected to heavy loads and harsh environments.
– **Precision Equipment**: Machine tool spindles, robotics, and aerospace components requiring **high rotational accuracy and rigidity**.

### **Conclusion**
NTN’s **Metric ISO Series Tapered Roller Bearings** and **Tapered Roller Sets** combine cutting-edge engineering with robust materials to deliver **peak performance in the most demanding applications**. Whether in automotive drivetrains or heavy industrial systems, these bearings provide **reliable load support, reduced maintenance, and extended operational life**—making them a trusted choice for engineers worldwide.

For applications where **precision, strength, and endurance** are critical, NTN’s tapered roller bearings stand as a benchmark of quality and innovation.

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Part Number d D T r Mass
31328X
140.000 mm
300.000 mm
70.000 mm
4.000 mm
31328XUS30-W1ND
140.000 mm
300.000 mm
77.000 mm
4.000 mm
31330X
150.000 mm
320.000 mm
82.000 mm
4.000 mm
31330XU
150.000 mm
320.000 mm
82.000 mm
4.000 mm
27.700 kg
320/22X
22.000 mm
44.000 mm
15.000 mm
0.600 mm
320/22XV1
22.000 mm
44.000 mm
15.000 mm
0.600 mm
0.106 kg
320/22XX2
22.000 mm
44.000 mm
15.000 mm
1.000 mm
31311A
55.000 mm
120.000 mm
31.500 mm
2.000 mm
320/28X
28.000 mm
52.000 mm
16.000 mm
1.000 mm
0.146 kg
31313A
65.000 mm
140.000 mm
36.000 mm
2.500 mm
320/28XX1
28.000 mm
52.000 mm
16.000 mm
1.000 mm
0.146 kg
31314A
70.000 mm
150.000 mm
38.000 mm
2.500 mm
320/32X
32.000 mm
58.000 mm
17.000 mm
1.000 mm
0.181 kg
31320X
100.000 mm
215.000 mm
56.500 mm
3.000 mm
320/32XX1
32.000 mm
58.000 mm
17.000 mm
1.000 mm
0.181 kg
31321X
105.000 mm
225.000 mm
58.000 mm
3.000 mm
31322X
110.000 mm
240.000 mm
63.000 mm
3.000 mm
31324X
120.000 mm
260.000 mm
68.000 mm
3.000 mm
9.830 kg
30324
120.000 mm
260.000 mm
59.500 mm
3.000 mm
30324P5
120.000 mm
260.000 mm
59.500 mm
3.000 mm
13.200 kg