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
598/592A
92.075
152.4
39.688
36.322
30.162
3.5
3.2
225000
285000
864/854
95.25
190.5
57.15
57.531
44.45
8
3.3
435000
500000
687/672
101.6
168.275
41.275
41.275
30.162
3.5
3.3
274000
345000
598A/592A
92.075
152.4
39.688
36.322
30.162
6.4
3.2
225000
285000
HH221440/HH221410
95.25
190.5
57.15
57.531
46.038
8
3.3
480000
520000
780/772
101.6
180.975
47.625
48.006
38.1
3.5
3.3
315000
375000
681/672
92.075
168.275
41.275
41.275
30.162
3.5
3.3
274000
345000
42381/42584
96.838
148.43
28.575
28.971
21.433
3.5
3
172000
218000
861/854
101.6
190.5
57.15
57.531
44.45
8
3.3
435000
500000
857/854
92.075
190.5
57.15
57.531
44.45
8
3.3
435000
500000
42381/42587
96.838
149.225
31.75
28.971
24.606
3.5
3.3
172000
218000
42368/42584
93.662
148.43
28.575
28.971
21.433
3
3
172000
218000
52387/52637
98.425
161.925
36.512
36.116
26.195
3.5
3.3
222000
286000
42368/42587
93.662
149.225
31.75
28.971
24.608
3
3.3
172000
218000
685/672
98.425
168.275
41.275
41.275
30.162
3.5
3.3
274000
345000
597/592A
93.662
152.4
39.688
36.322
30.162
3.5
3.2
225000
285000
779/772
98.425
180.975
47.625
48.006
38.1
3.5
3.3
315000
375000
JM719149/JM719113
95
150
35
34
27
3
2.5
225000
285000
866/854
98.425
190.5
57.15
57.531
44.45
3.5
3.3
435000
500000
47896/47820
95.25
146.05
33.338
34.925
26.195
3.5
3.3
192000
257000