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
HM231140/HM231110
146.05
236.538
57.15
56.642
44.45
3.5
3.3
555000
720000
67985/67920
206.375
282.575
46.038
46.038
36.512
3.5
3.3
415000
715000
99575/99100
146.05
254
66.675
66.675
47.625
7
3.3
635000
830000
99587/99100
149.225
254
66.675
66.675
47.625
7
3.3
635000
830000
99600/99100
152.4
254
66.675
66.675
47.625
7
3.3
635000
830000
46780/46720
158.75
225.425
41.275
39.688
33.338
3.5
3.3
295000
540000
L327249/L327210
133.35
177.008
25.4
26.195
20.638
1.5
1.5
153000
258000
67780/67720
165.1
247.65
47.625
47.625
38.1
3.5
3.3
400000
645000
56425/56650
107.95
165.1
36.512
36.512
26.988
3.5
3.3
229000
305000
68462/68712
117.475
180.975
34.925
31.75
25.4
3.5
3.3
200000
237000
71425/71750
107.95
190.5
47.625
49.212
34.925
3.5
3.3
365000
465000
JL724348/JL724314
120
170
25.4
25.4
19.05
3.3
3.3
160000
219000
HH224340/HH224310
107.95
212.725
66.675
66.675
53.975
8
3.3
700000
810000
M224748/M224710
120
174.625
35.72
36.512
27.783
3.5
1.5
261000
385000
LM522549/LM522510
109.987
159.987
34.925
34.925
26.988
3.5
3.3
201000
315000
48282/48220
120.65
182.562
39.688
38.1
33.338
3.5
3.3
280000
445000
LM522548/LM522510
109.987
159.987
34.925
34.925
26.988
8
3.3
201000
315000
795/792
120.65
206.375
47.625
47.625
34.925
3.3
3.3
390000
530000
64433/64700
109.992
177.8
41.275
41.275
30.162
3.5
3.3
286000
375000
48286/48220
123.825
182.562
39.688
38.1
33.338
3.5
3.3
280000
445000