Cup for Tapered Roller Bearing – Inch Series and J Series

**NTN Tapered Roller Bearings: Precision, Durability, and Performance for Demanding Applications**

NTN is a global leader in bearing technology, renowned for its high-performance tapered roller bearings designed to meet the rigorous demands of industrial machinery, automotive systems, and precision equipment. Among NTN’s extensive bearing portfolio, the **Inch and J Series Tapered Roller Bearings** stand out for their exceptional load capacity, durability, and precision engineering. These bearings are specifically optimized to handle combined radial and axial loads, making them ideal for applications where reliability and long service life are critical.

### **Technical Features and Design Advantages**
NTN’s **Inch and J Series Tapered Roller Bearings** feature a precision-machined conical geometry, with tapered rollers guided by a robust ribbed inner ring (cone) and a matching outer ring (cup). This design ensures optimal load distribution, minimizing friction and wear while enhancing operational efficiency. Key technical features include:

– **High Load Capacity:** The tapered roller design effectively manages both radial and thrust loads, making these bearings suitable for heavy-duty applications.
– **Precision-Ground Surfaces:** Advanced manufacturing techniques ensure tight tolerances and smooth operation, reducing vibration and noise.
– **Heat-Treated Components:** High-carbon chromium steel construction, combined with specialized heat treatment, enhances hardness and fatigue resistance.
– **Interchangeability:** NTN’s Inch and J Series bearings conform to standardized dimensions, ensuring compatibility with industry specifications.
– **Sealed and Open Variants:** Options include open bearings for high-speed applications and sealed units for contamination resistance in harsh environments.

### **Performance Benefits**
NTN’s tapered roller bearings deliver superior performance in demanding conditions, offering:

– **Extended Service Life:** Advanced materials and precision engineering reduce wear, prolonging bearing life even under heavy loads.
– **Enhanced Efficiency:** Optimized internal geometry minimizes friction, lowering energy consumption and operating temperatures.
– **Reliability in Harsh Conditions:** Whether in high-temperature industrial settings or high-load automotive applications, NTN bearings maintain consistent performance.
– **Easy Maintenance:** Standardized designs simplify installation and replacement, reducing downtime.

### **Components for Tapered Roller Bearings: Cups and Cones**
NTN provides **precision-engineered cups and cones** for tapered roller bearings, ensuring seamless compatibility and performance. The **cup (outer ring)** is designed to perfectly match the cone (inner ring assembly), maintaining optimal alignment and load distribution. These components are manufactured to exacting tolerances, ensuring smooth operation and long-term reliability.

### **Typical Applications**
NTN’s Inch and J Series Tapered Roller Bearings are widely used in:
– **Industrial Machinery:** Gearboxes, conveyors, mining equipment, and heavy machinery requiring high load capacity.
– **Automotive Systems:** Wheel hubs, differentials, transmissions, and axle systems where durability and precision are essential.
– **Precision Equipment:** Machine tools, agricultural machinery, and construction equipment demanding reliable rotational performance.

With a reputation for innovation and quality, NTN continues to set the benchmark for tapered roller bearing technology, delivering solutions that enhance performance, efficiency, and longevity across industries. Whether in automotive drivetrains or heavy industrial applications, NTN’s tapered roller bearings provide the reliability and precision needed to keep operations running smoothly.

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Part Number D Wo W r Mass
3321
77.534 mm
23.812 mm
29.370 mm
3.300 mm
3339
80.035 mm
23.812 mm
29.370 mm
1.500 mm
HM926716
279.400 mm
53.975 mm
82.550 mm
6.400 mm
08231
58.738 mm
10.716 mm
29.154 mm
1.000 mm
0.057 kg
M84210PX2
59.530 mm
18.288 mm
23.368 mm
1.500 mm
0.129 kg
71751D
190.500 mm
80.963 mm
106.365 mm
1.500 mm
9.091 kg
742D
155.575 mm
85.725 mm
101.600 mm
1.500 mm
74851D
215.900 mm
80.963 mm
106.363 mm
1.500 mm
9.781 kg
752A
159.995 mm
38.100 mm
47.625 mm
0.800 mm
752D
161.925 mm
85.725 mm
104.775 mm
1.500 mm
3.700 kg
753A
168.275 mm
49.213 mm
49.213 mm
N/A
774D
180.975 mm
85.725 mm
104.775 mm
1.500 mm
9.440 kg
77676BW
171.450 mm
53.183 mm
N/A
3.300 mm
5.548 kg
77676W
171.450 mm
57.150 mm
55.563 mm
3.300 mm
5.112 kg
792D
206.375 mm
82.550 mm
107.950 mm
0.800 mm
9.900 kg
81963D
244.475 mm
79.375 mm
107.950 mm
1.500 mm
833W
168.275 mm
44.450 mm
57.150 mm
3.300 mm
932D
212.725 mm
117.475 mm
142.875 mm
1.500 mm
19.100 kg
A6157
39.992 mm
9.525 mm
12.014 mm
1.300 mm
0.031 kg
HH221410D
190.500 mm
104.775 mm
127.000 mm
1.500 mm
HH224310D
212.725 mm
117.475 mm
142.875 mm
1.500 mm
14.160 kg
HM89210
79.375 mm
22.664 mm
29.370 mm
3.300 mm
0.250 kg
LM102911
73.431 mm
17.620 mm
21.430 mm
0.800 mm
0.119 kg
LM104911A
82.550 mm
18.542 mm
23.147 mm
0.800 mm
0.156 kg