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
HR30207J
35
72
18.25
17
15
1.5
1.5
66500
59500
HR30306J
30
72
20.75
19
16
1.5
1.5
73000
60000
HR32207C
35
72
24.25
23
18
1.5
1.5
74500
71500
HR32306J
30
72
28.75
27
23
1.5
1.5
98000
88500
HR32207J
35
72
24.25
23
19
1.5
1.5
86500
83500
HR32306CJ
30
72
28.75
27
23
1.5
1.5
93500
86500
HR33207J
35
72
28
28
22
1.5
1.5
107000
108000
HR320/32XJ
32
58
17
17
13
1
1
46000
47000
HR30307DJ
35
80
22.75
21
15
2
1.5
76500
68000
HR303/28
28
68
19.75
18
15
1.5
1.5
68000
55500
330/32
32
58
21
20
16
1
1
50500
50000
HR31307J
35
80
22.75
21
15
2
1.5
76500
68000
HR32906J
30
47
12
12
9
0.3
0.3
21700
24400
HR302/32C
32
65
18.25
17
14
1
1
56500
52500
HR30307C
35
80
22.75
21
16
2
1.5
83500
70500
HR32006XJ
30
55
17
17
13
1
1
44500
44500
HR302/32
32
65
18.25
17
15
1
1
59500
54000
HR30307J
35
80
22.75
21
18
2
1.5
93500
79000
HR33006J
30
55
20
20
16
1
1
51500
54000
HR322/32C
32
65
22.25
21
17
1
1
60500
60000