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
30252
260
480
89
80
67
6
5
1460000
1700000
32340
200
420
146
138
115
6
5
2240000
2870000
32252
260
480
137
130
106
6
5
2340000
3300000
HR32944J
220
300
51
51
39
3
2.5
600000
990000
30352
260
540
113
102
85
6
6
2300000
2640000
HR32044XJ
220
340
76
76
57
4
3
1090000
1610000
HR32956J
280
380
63.5
63.5
48
3
2.5
945000
1580000
30244
220
400
72
65
54
5
4
995000
1150000
HR32056XJ
280
420
87
87
65
5
4
1450000
2240000
HR33030J
150
225
59
59
46
3
2.5
535000
805000
HR32934J
170
230
38
38
30
2.5
2
360000
560000
HR32038XJ
190
290
64
64
48
3
2.5
800000
1170000
HR30230J
150
270
49
45
38
4
3
595000
665000
HR32034XJ
170
260
57
57
43
3
2.5
620000
890000
HR32230J
150
270
77
73
60
4
3
865000
1080000
HR30234J
170
310
57
52
43
5
4
775000
885000
30330
150
320
72
65
55
5
4
845000
860000
HR32234J
170
310
91
86
71
5
4
1140000
1450000
HR30330J
150
320
72
65
55
5
4
1020000
1060000
30334D
170
360
80
72
50
5
4
935000
1040000
HR31330J
150
320
82
75
50
5
4
975000
1100000
HR30334J
170
360
80
72
62
5
4
1240000
1310000
32330
150
320
114
108
90
5
4
1370000
1700000
30334
170
360
80
72
62
5
4
1040000
1080000