Double-Row Tapered Roller Bearings

**Introduction to NSK’s Double Row Tapered Roller Bearings: Precision, Durability, and High-Performance Motion Control**

In the world of precision motion and control, NSK stands as a leader in engineering high-performance bearing solutions that meet the rigorous demands of modern industrial machinery, automotive systems, and precision equipment. Among NSK’s extensive portfolio of roller bearings, **Double Row Tapered Roller Bearings** represent a critical innovation, combining superior load capacity, rigidity, and operational efficiency in a compact design. These bearings are engineered to handle **combined radial and axial loads** with exceptional stability, making them indispensable in applications where precision, durability, and high-speed performance are paramount.

### **Technical Features and Design Advantages**
NSK’s Double Row Tapered Roller Bearings are designed with precision-ground tapered rollers arranged in two rows between conical raceways. This configuration ensures optimal load distribution, reducing stress concentrations and extending service life. Key technical features include:

– **High Load Capacity**: The double-row design supports substantial radial and axial loads simultaneously, making these bearings ideal for heavy-duty applications.
– **Enhanced Rigidity and Alignment**: Precision manufacturing minimizes internal clearance, improving shaft positioning accuracy and reducing vibration—critical for high-speed operations.
– **Optimized Lubrication and Heat Resistance**: Advanced cage designs and material selections ensure efficient lubrication retention and thermal stability, even in harsh operating conditions.
– **Interchangeability and Ease of Installation**: NSK’s standardized designs allow for seamless integration into existing systems, reducing downtime during maintenance or replacement.

### **Performance Advantages**
NSK’s Double Row Tapered Roller Bearings outperform conventional bearings in several key areas:

– **Extended Service Life**: Advanced materials and heat treatment processes enhance wear resistance, reducing maintenance frequency.
– **Energy Efficiency**: Reduced friction and optimized internal geometry lower power consumption, contributing to sustainable operations.
– **Noise and Vibration Reduction**: Precision engineering ensures smooth rotation, critical for applications in sensitive environments like medical or aerospace equipment.

### **Typical Applications**
These bearings are widely used across industries where reliability under heavy or dynamic loads is essential:

– **Industrial Machinery**: Gearboxes, rolling mills, and heavy construction equipment benefit from their high load capacity and durability.
– **Automotive Systems**: Wheel hubs, transmissions, and differentials rely on their ability to manage both radial and axial forces efficiently.
– **Precision Equipment**: Machine tool spindles and robotics require the rigidity and accuracy provided by NSK’s tapered roller bearings for consistent performance.

By integrating NSK’s Double Row Tapered Roller Bearings into motion control systems, engineers can achieve **higher efficiency, longer operational life, and reduced total cost of ownership**. Whether in demanding industrial environments or high-precision applications, NSK’s bearings deliver the reliability and performance needed to keep machinery running smoothly and efficiently.

For industries that depend on precision motion, NSK’s tapered roller bearings are not just components—they are **engineered solutions for superior performance**.

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Designations Nominal Dimensions Basic Load Ratings Speeds
Limiting Speeds
d
mm
D
mm
B2
mm
C
mm
r (min.)
mm
r1 (min.)
mm
Cr
N
C0r
N
Grease
min-1
240KBE031+L
240
400
160
128
5
1.5
1990000
3050000
630
240KBE31+L
240
400
128
114
5
1.5
1450000
2190000
630
240KBE030+L
240
360
115
92
4
1.5
1250000
2040000
670
240KBE30+L
240
360
92
82
4
1.5
960000
1490000
670
220KBE42+L
220
400
158
122
5
1.5
1710000
2300000
670
220KBE031+L
220
370
150
120
5
1.5
1800000
2760000
710
220KBE31+L
220
370
120
107
5
1.5
1360000
1940000
710
220KBE030+L
220
340
113
90
4
1.5
1130000
1830000
750
220KBE30+L
220
340
90
80
4
1.5
855000
1280000
750
190KBE31+L
190
320
104
92
4
1.5
985000
1380000
800
200KBE42+L
200
360
142
110
5
1.5
1360000
1780000
750
200KBE031+L
200
340
140
112
4
1.5
1550000
2250000
750
200KBE31+L
200
340
112
100
4
1.5
1160000
1670000
750
200KBE030+L
200
310
103
82
3
1
955000
1400000
850
200KBE30+L
200
310
82
73
3
1
720000
1070000
800
190KBE52X+L
190
340
204
160
5
1.5
2060000
3100000
800
190KBE42+L
190
340
133
105
5
1.5
1220000
1580000
800
190KBE031+L
190
320
130
104
4
1.5
1320000
1960000
800
160KBE30+L
160
240
60
53
3
1
435000
580000
1100
150KBE52X+L
150
270
164
130
4
1
1260000
1800000
1000
120KBE31+L
120
200
62
55
2.5
0.6
385000
500000
1400
HR80KBE52X+L
80
140
78
63.5
2.5
0.6
405000
505000
2000
120KBE030+L
120
180
58
46
2.5
0.6
320000
450000
1500
120KBE30+L
120
180
46
41
2.5
0.6
227000
296000
1500