Metric Series Tapered Roller Bearings

**Introduction to NSK’s Metric Series Tapered Roller Bearings: Precision, Durability, and Performance**

In the demanding world of industrial machinery, automotive systems, and precision equipment, the reliability and efficiency of rotating components are critical. NSK’s **Metric Series Tapered Roller Bearings** stand at the forefront of precision motion and control technologies, delivering exceptional load capacity, rigidity, and longevity in high-performance applications. Engineered with advanced materials and precision manufacturing techniques, these bearings are designed to handle combined radial and axial loads while maintaining smooth operation under extreme conditions.

### **Technical Features and Design Excellence**
NSK’s Metric Series Tapered Roller Bearings are meticulously crafted to meet the stringent demands of modern industrial and automotive applications. Key features include:

– **Optimized Roller and Raceway Geometry**: The tapered design ensures uniform stress distribution, reducing edge loading and extending service life.
– **High-Grade Materials**: Manufactured from premium steel alloys with advanced heat treatment processes, these bearings offer superior wear resistance and fatigue strength.
– **Precision Ground Surfaces**: Ultra-smooth raceways and rollers minimize friction, ensuring efficient power transmission and reduced energy loss.
– **Robust Cage Designs**: Options include pressed steel, machined brass, or polymer cages, each selected for optimal performance in specific operating environments (e.g., high speeds, corrosive conditions).
– **Sealing and Lubrication Options**: Configurations with integrated seals or shields protect against contamination, while specialized grease formulations enhance performance in high-temperature or high-speed applications.

### **Performance Advantages**
NSK’s tapered roller bearings excel in applications where reliability and precision are non-negotiable:

– **High Load Capacity**: The tapered geometry allows for simultaneous handling of heavy radial and thrust loads, making them ideal for gearboxes, wheel hubs, and heavy machinery.
– **Enhanced Rigidity and Stability**: Precision alignment ensures minimal deflection under load, critical for applications like machine tool spindles and industrial drivetrains.
– **Extended Service Life**: Advanced fatigue-resistant materials and optimized lubrication systems reduce maintenance intervals and downtime.
– **Energy Efficiency**: Low friction design contributes to reduced power consumption, aligning with modern sustainability goals.

### **Typical Applications**
NSK’s Metric Series Tapered Roller Bearings are widely used across industries, including:

– **Automotive Systems**: Wheel bearings, differential assemblies, and transmission systems benefit from their durability and load-handling capabilities.
– **Industrial Machinery**: Conveyors, crushers, and mining equipment rely on these bearings for their ability to withstand shock loads and harsh environments.
– **Precision Equipment**: Machine tools, robotics, and aerospace actuators demand the high rigidity and accuracy that NSK’s tapered roller bearings provide.

By combining cutting-edge engineering with decades of expertise, NSK ensures that its Metric Series Tapered Roller Bearings deliver unmatched performance, reliability, and efficiency—making them the preferred choice for engineers and manufacturers worldwide. Whether in high-speed automotive drivetrains or heavy industrial gearboxes, these bearings are built to excel under pressure while maintaining precision and longevity.

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Designations Nominal Dimensions Basic Load Ratings
d
mm
D
mm
T
mm
B
mm
C
mm
Cone r (min.)
mm
Cup r (min.)
mm
Cr
N
C0r
N
30256
280
500
89
80
67
6
5
1530000
1900000
32256
280
500
137
130
106
6
5
2400000
3450000
32356
280
580
187
175
145
6
6
4050000
5400000
32960
300
420
76
72
62
4
3
1100000
1820000
HR32960J
300
420
76
76
57
4
3
1240000
2100000
HR32060XJ
300
460
100
100
74
5
4
1770000
2700000
30260
300
540
96
85
71
6
5
1770000
2100000
32260
300
540
149
140
115
6
5
2730000
3700000
32964
320
440
76
72
63
4
3
1110000
1880000
HR30328J
140
300
67.75
62
53
5
4
910000
945000
30328
140
300
67.75
62
53
5
4
740000
740000
HR31328J
140
300
77
70
47
5
4
855000
955000
32328
140
300
107.75
102
85
5
4
1210000
1440000
32930
150
210
38
36
31
2.5
2
305000
440000
HR32930J
150
210
38
38
30
2.5
2
345000
520000
HR32030XJ
150
225
48
48
36
3
2.5
460000
650000
HR33030J
150
225
59
59
46
3
2.5
535000
805000
HR30230J
150
270
49
45
38
4
3
595000
665000
HR32230J
150
270
77
73
60
4
3
865000
1080000
30330
150
320
72
65
55
5
4
845000
860000
HR30330J
150
320
72
65
55
5
4
1020000
1060000
HR31330J
150
320
82
75
50
5
4
975000
1100000
32330
150
320
114
108
90
5
4
1370000
1700000
HR32932J
160
220
38
38
30
2.5
2
365000
570000