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
HM804849/HM804810
48.412
95.25
30.162
29.37
23.02
3.5
3.3
130000
143000
HM807044/HM807011
49.212
104.775
36.512
36.512
28.575
3.5
0.8
164000
182000
HH506348/HH506310
49.212
114.3
44.45
44.45
36.068
3.5
3.3
242000
243000
JLM104948/JLM104910
50
82
21.5
21.5
17
3
0.5
87500
96000
LM104947A/LM104911
50
82.55
21.59
22.225
16.51
0.5
1.3
87500
96000
366/362A
50
88.9
20.638
22.225
16.513
2.3
1.3
90000
85000
JM205149/JM205110
50
90
28
28
23
3
2.5
128000
136000
JHM807045/JHM807012
50
105
37
36
29
3
2.5
164000
182000
L305649/L305610
50.8
80.962
18.258
18.258
14.288
1.5
1.5
65500
81000
LM104949/LM104911A
50.8
82.55
23.622
22.225
18.542
3.5
0.8
87500
96000
LM104949/LM104912
50.8
82.931
21.59
22.225
16.51
3.5
1.3
87500
96000
18790/18720
50.8
85
17.462
17.462
13.495
3.5
1.5
59500
63000
18200/18337
50.8
85.725
19.05
18.263
12.7
1.5
1.5
52500
54000
368/362A
50.8
88.9
20.638
22.225
16.513
1.5
1.3
90000
85000
368A/362A
50.8
88.9
20.638
22.225
16.513
3.5
1.3
90000
85000
28580/28521
50.8
92.075
24.608
25.4
19.845
3.5
0.8
104000
117000
3775/3730
50.8
93.264
30.162
30.302
23.812
0.8
0.8
127000
136000
3780/3730
50.8
93.264
30.162
30.302
23.812
3.5
0.8
127000
136000
33889/33821
50.8
95.25
27.783
28.575
22.225
3.5
2.3
135000
144000
49585/49520
50.8
101.6
31.75
31.75
25.4
3.5
3.3
146000
150000
529/522
50.8
101.6
34.925
36.068
26.988
0.8
3.3
169000
169000
529X/522
50.8
101.6
34.925
36.068
26.988
3.5
3.3
169000
169000
HM807046/HM807011
50.8
104.775
36.512
36.512
28.575
3.5
0.8
164000
182000
HM807046/HM807010
50.8
104.775
36.512
36.512
28.575
3.5
3.3
164000
182000