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.

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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
484/472
70
120
29.794
29.007
24.237
2
2
151000
169000
H715343/H715311
68.262
136.525
46.038
46.038
36.512
3.5
3.3
287000
370000
33281/33462
71.438
117.475
30.162
30.162
23.812
3.5
3.3
147000
179000
9185/9121
68.262
152.4
47.625
46.038
31.75
3.5
3.3
292000
267000
47490/47420
71.438
120
32.545
32.545
26.195
3.5
3.3
178000
215000
LM613449/LM613410
69.85
112.712
22.225
21.996
15.875
1.5
0.8
105000
113000
567A/563
71.438
127
36.512
36.17
28.575
3.5
3.3
204000
234000
29675/29620
69.85
112.712
25.4
25.4
19.05
1.5
3.3
118000
152000
567S/563
71.438
127
36.512
36.17
28.575
6.4
3.3
204000
234000
33275/33462
69.85
117.475
30.162
30.162
23.812
3.5
3.3
147000
179000
645/633
71.438
130.175
41.275
41.275
31.75
6.4
3.3
239000
263000
47487/47420
69.85
120
32.545
32.545
26.195
3.5
3.3
178000
215000
644/632
71.438
136.525
41.275
41.275
31.75
3.5
3.3
239000
263000
29675/29630
69.85
120.65
25.4
25.4
19.05
1.5
3.3
118000
152000
H414249/H414210
71.438
136.525
41.275
41.275
31.75
3.5
3.3
282000
297000
HM212049/HM212010
66.675
122.238
38.1
38.354
29.718
3.5
1.5
231000
245000
566/563X
69.85
127
36.512
36.17
28.575
3.5
0.8
204000
234000
H715345/H715311
71.438
136.525
46.038
46.038
36.512
3.5
3.3
287000
370000
HM212049/HM212011
66.675
122.238
38.1
38.354
29.718
3.5
3.3
231000
245000
643/633
69.85
130.175
41.275
41.275
31.75
3.5
3.3
239000
263000
29685/29620
73.025
112.712
25.4
25.4
19.05
3.5
3.3
118000
152000
560/552A
66.675
123.825
38.1
36.678
30.162
3.5
3.3
198000
221000
H913849/H913810
69.85
146.05
41.275
39.688
25.4
3.5
3.3
214000
195000
33287/33462
73.025
117.475
30.162
30.162
23.812
3.5
3.3
147000
179000