Inch Series Tapered Roller Bearings

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

In industrial machinery, automotive systems, and precision equipment, the reliability of rotating components is critical to operational efficiency and longevity. NSK’s **Inch Series Tapered Roller Bearings** are engineered to meet these demands, delivering exceptional load capacity, precision alignment, and durability in challenging environments. As part of NSK’s broader portfolio of precision motion and control technologies, these bearings combine advanced materials, optimized geometry, and rigorous manufacturing standards to ensure superior performance in high-stress applications.

### **Technical Features and Design Advantages**
NSK’s Inch Series Tapered Roller Bearings are designed with a conical raceway and tapered rollers, enabling them to handle **combined radial and axial loads** efficiently. The inch-based sizing ensures compatibility with legacy machinery and North American industrial standards, making them ideal for retrofitting or upgrading existing systems. Key features include:

– **Optimized Contact Geometry**: The precision-ground rollers and raceways distribute loads evenly, reducing stress concentrations and minimizing wear.
– **High-Strength Materials**: Manufactured from premium-grade steel and subjected to advanced heat treatment processes, these bearings resist fatigue and extend service life.
– **Advanced Cage Designs**: Options include pressed steel or machined brass cages, which enhance lubrication retention and reduce friction at high speeds.
– **Sealing and Lubrication Options**: Configurations with integrated seals or specialized grease fillings cater to contaminated or high-temperature environments.

### **Performance Benefits**
The Inch Series Tapered Roller Bearings excel in applications requiring **high rigidity, shock resistance, and precise rotational control**. Their tapered design inherently accommodates misalignment, reducing edge loading and premature failure. Additional advantages include:

– **Extended Maintenance Intervals**: Robust construction and efficient lubrication systems lower downtime.
– **Energy Efficiency**: Reduced friction losses contribute to lower power consumption in industrial drives and automotive transmissions.
– **Customization**: NSK offers tailored solutions for specific load, speed, or environmental conditions.

### **Typical Applications**
These bearings are widely used in sectors where precision and reliability are non-negotiable:

– **Industrial Machinery**: Conveyors, gearboxes, and heavy-duty pumps in mining, agriculture, and construction.
– **Automotive Systems**: Wheel hubs, differential assemblies, and transmission components in trucks and off-highway vehicles.
– **Precision Equipment**: Machine tool spindles and robotics, where smooth motion and load stability are critical.

By leveraging NSK’s expertise in precision engineering, the Inch Series Tapered Roller Bearings provide a dependable solution for demanding motion control challenges—enhancing performance while reducing total cost of ownership. Whether in harsh industrial settings or high-speed automotive applications, NSK’s innovations ensure optimal functionality and longevity.

MORE +
CLOSE +
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
559/522A
63.5
123.825
38.1
36.678
30.162
3.5
3.3
198000
221000
3994/3920
66.675
112.712
30.162
30.048
23.812
5.5
3.2
147000
173000
H715334/H715311
61.912
136.525
46.038
46.038
36.512
3.5
3.3
287000
370000
565/563
63.5
127
36.512
36.17
28.575
3.5
3.3
204000
234000
39590/39521
66.675
112.712
30.162
30.162
23.812
3.5
0.8
175000
202000
H913842/H913810
61.912
146.05
41.275
39.688
25.4
3.5
3.3
214000
195000
639/633
63.5
130.175
41.275
41.275
31.75
3.5
3.3
239000
263000
39590/39520
66.675
112.712
30.162
30.162
23.812
3.5
3.3
175000
202000
9180/9121
61.912
152.4
47.625
46.038
31.75
3.5
3.3
292000
267000
78250/78537
63.5
136.525
36.512
33.236
23.52
2.3
3.3
187000
183000
33262/33462
66.675
117.475
30.162
30.162
23.812
3.5
3.3
147000
179000
L610549/L610510
63.5
94.458
19.05
19.05
15.083
1.5
1.5
73000
100000
639/632
63.5
136.525
41.275
41.275
31.75
3.5
3.3
239000
263000
560/553X
66.675
122.238
38.1
36.678
30.162
3.5
3.3
198000
221000
39250/39412
63.5
104.775
21.433
22
15.875
2
2
88000
91500
78250/78551
63.5
140.03
36.512
33.236
23.52
2.3
2.3
187000
183000
29586/29520
63.5
107.95
25.4
25.4
19.05
1.5
3.3
111000
138000
569/563
64.963
127
36.512
36.17
28.575
3.5
3.3
204000
234000
390A/394A
63.5
110
22
21.996
18.824
1.5
1.3
105000
113000
JLM710949/JLM710910
65
105
24
23
18.5
3
1
114000
126000
395/394A
63.5
110
22
21.996
18.824
3.5
1.3
105000
113000
JM511946/JM511910
65
110
28
28
22.5
3
2.5
147000
173000
3982/3920
63.5
112.712
30.162
30.048
23.812
3.5
3.2
147000
173000
478/472A
65
120
29.002
29.007
23.444
2.3
3.3
151000
169000