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
M804049/M804010
47.625
88.9
25.4
25.4
19.05
3.5
3.3
106000
107000
HM804846/HM804810
47.625
95.25
30.162
29.37
23.02
3.5
3.3
130000
143000
528/522
47.625
101.6
34.925
36.068
26.988
3.5
3.3
169000
169000
55187/55437
47.625
111.125
30.162
26.909
20.638
3.5
3.3
114000
110000
44150/44348
38.1
88.501
25.4
23.698
17.462
2.3
1.5
85000
75500
418/414
38.1
88.501
26.988
29.083
22.225
3.5
1.5
118000
109000
53150/53375
38.1
95.25
30.958
28.301
20.638
1.5
0.8
96000
97000
M201047/M201011
39.688
73.025
25.654
22.098
21.336
0.8
2.3
77000
80000
2789/2720
39.688
76.2
23.812
25.654
19.05
3.5
3.3
90500
91000
3386/3320
39.688
80.167
29.37
30.391
23.812
0.8
3.3
114000
108000
344A/332
40
80
21
22.403
17.826
0.8
1.3
84000
75500
344/332
40
80
21
22.403
17.826
3.5
1.3
84000
75500
44157/44348
40
88.501
25.4
23.698
17.462
2.3
1.5
85000
75500
LM300849/LM300811
41
68
17.5
18
13.5
SPEC
1.5
53500
58000
18590/18520
41.275
73.025
16.667
17.462
12.7
3.5
1.5
55000
54000
LM501349/LM501310
41.275
73.431
19.558
19.812
14.732
3.5
0.8
67000
67000
LM501349/LM501314
41.275
73.431
21.43
19.812
16.604
3.5
0.8
67000
67000
11162/11300
41.275
76.2
18.009
17.384
14.288
1.5
1.5
52000
51000
24780/24720
41.275
76.2
22.225
23.02
17.462
3.5
0.8
81000
82000
24780/24721
41.275
76.2
25.4
23.02
20.638
3.5
2.3
81000
82000
26882/26822
41.275
79.375
23.812
25.4
19.05
3.5
0.8
91000
93000
336/332
41.275
80
21
22.403
17.826
0.8
1.3
84000
75500
342/332
41.275
80
21
22.403
17.826
3.5
1.3
84000
75500
26882/26820
41.275
80.167
25.4
25.4
20.638
3.5
3.3
91000
93000