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
15580/15523
26.988
60.325
19.842
17.462
15.875
3.5
1.5
49000
45500
15106/15245
26.988
62
19.05
20.638
14.288
0.8
1.3
56500
53000
1988/1922
28.575
57.15
19.845
19.355
15.875
3.5
1.5
49500
44500
LM67043/LM67010
28.575
59.131
15.875
16.764
11.811
SPEC
1.3
42500
41500
15113/15245
28.575
62
19.05
20.638
14.288
0.8
1.3
56500
53000
15112/15245
28.575
62
19.05
20.638
14.288
3.5
1.3
56500
53000
M86647/M86610
28.575
64.292
21.433
21.433
16.67
1.5
1.5
63000
64500
02474/02420
28.575
68.262
22.225
22.225
17.462
0.8
1.5
68000
64000
41126/41286
28.575
72.626
24.608
24.257
17.462
1.5
1.5
73500
58000
41125/41286
28.575
72.626
24.608
24.257
17.462
4.8
1.5
73500
58000
02872/02820
28.575
73.025
22.225
22.225
17.462
0.8
3.3
67000
64500
L45449/L45410
29
50.292
14.224
14.732
10.668
3.5
1.3
33000
34000
2690/2631
29.367
66.421
23.812
25.433
19.05
3.5
1.3
80000
73000
17118/17244
30
62
16.002
16.566
14.288
1.5
1.5
45500
39500
15117/15245
30
62
19.05
20.638
14.288
1.3
1.3
56500
53000
15117/15250
30
63.5
20.638
20.638
15.875
1.3
1.3
56500
53000
26118/26283
30
72
19
18.923
15.875
1.5
1.5
64000
56000
15116/15245
30.112
62
19.05
20.638
14.288
0.8
1.3
56500
53000
08118/08231
30.162
58.738
14.684
15.08
10.716
3.5
1
35500
33500
M86649/M86610
30.162
64.292
21.433
21.433
16.67
1.5
1.5
63000
64500
A2047/A2126
12
31.991
10.008
10.785
7.938
0.8
1.3
12700
8900
A4050/A4138
12.7
34.988
10.998
10.988
8.73
1.3
1.3
14400
10900
A4059/A4138
15
34.988
10.998
10.988
8.73
0.8
1.3
14400
10900
L21549/L21511
15.875
34.988
10.998
10.998
8.712
1.3
1.3
17000
13400