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
M802048/M802011
41.275
82.55
26.543
25.654
20.193
3.5
3.3
96500
102000
3877/3820
41.275
85.725
30.162
30.162
23.812
3.5
3.3
112000
115000
3576/3525
41.275
87.312
30.162
30.886
23.812
0.8
3.3
118000
120000
44162/44348
41.275
88.501
25.4
23.698
17.462
2.3
1.5
85000
75500
HM803145/HM803110
41.275
88.9
30.162
29.37
23.02
0.8
3.3
118000
129000
HM803146/HM803110
41.275
88.9
30.162
29.37
23.02
3.5
3.3
118000
129000
4388/4335
41.275
90.488
39.688
40.386
33.338
3.5
3.3
171000
180000
46162/46368
41.275
93.662
31.75
31.75
26.195
0.8
3.3
135000
142000
HM804840/HM804810
41.275
95.25
30.162
29.37
23.02
3.5
3.3
130000
143000
53162/53387
41.275
98.425
30.958
28.301
20.638
1.5
0.8
96000
97000
12168/12303
42.862
76.992
17.462
17.145
11.908
1.5
1.5
54000
54000
22168/22325
42.862
82.55
19.842
19.837
15.08
2.3
1.5
71500
69000
25578/25520
42.862
82.931
23.812
25.4
19.05
2.3
0.8
94000
99000
25578/25523
42.862
82.931
26.988
25.4
22.225
2.3
2.3
94000
99000
26884/26823
42.875
76.2
25.4
25.4
20.638
3.5
1.5
95000
98500
342S/332
42.875
80
21
22.403
17.826
3.5
1.3
84000
75500
25577/25523
42.875
82.931
26.988
25.4
22.225
3.5
2.3
94000
99000
25577/25521
42.875
83.058
23.812
25.4
19.05
3.5
3.3
94000
99000
16986/16929
43
74.988
19.368
19.837
14.288
1.5
1.3
64500
68000
13175/13318
44.45
80.962
19.05
17.462
14.288
0.3
1.5
55500
57000
HM88649/HM88610
34.925
72.233
25.4
25.4
19.842
2.3
2.3
78000
83500
02878/02820
34.925
73.025
22.225
22.225
17.462
0.8
3.3
67000
64500
2877/2820
34.925
73.025
22.225
23.812
17.462
3.5
3.3
78000
77000
25877/25821
34.925
73.025
23.812
24.608
19.05
1.5
0.8
87500
86000