Sealed Angular Contact Ball Bearings

**NTN Precision Angular Contact Ball Bearings: Engineered for Performance and Reliability**

NTN Corporation, a global leader in bearing technology, delivers exceptional performance with its range of **Angular Contact Ball Bearings**, designed to meet the rigorous demands of industrial machinery, automotive systems, and high-precision equipment. These bearings are engineered to handle combined radial and axial loads with superior accuracy, durability, and efficiency, making them indispensable in applications where precision, speed, and reliability are critical.

### **Technical Features & Design Advantages**
NTN’s **Angular Contact Ball Bearings (ACBB)** feature a unique raceway design where the inner and outer rings are offset to support axial loads in one direction while accommodating radial loads. The contact angle—typically 15°, 25°, or 40°—determines the load distribution, with steeper angles providing higher axial load capacity. Key technical enhancements include:

– **High-Precision Grinding & Super-Finished Surfaces** – Optimized for minimal friction and vibration, ensuring smooth operation in high-speed applications.
– **Advanced Cage Designs** – Options include pressed steel, machined brass, or polymer cages to reduce weight, improve lubrication retention, and enhance rotational stability.
– **Sealed & Shielded Variants** – **Sealed Angular Contact Ball Bearings** incorporate contact or non-contact seals to prevent contamination and retain grease, extending service life in harsh environments.
– **Heat Treatment & Special Materials** – NTN utilizes high-grade steel alloys and advanced heat treatment processes (such as **SUJ2 bearing steel**) to enhance hardness, fatigue resistance, and operational longevity.

### **Performance Benefits**
NTN’s precision bearings excel in applications requiring:
– **High-Speed Capability** – Low friction and optimized internal geometry allow for superior rotational performance in machine tool spindles and turbochargers.
– **Rigidity & Load Capacity** – The angular contact design ensures stable operation under combined loads, critical for robotics, gearboxes, and electric motors.
– **Extended Service Life** – Reduced wear and optimized lubrication minimize maintenance needs, lowering total cost of ownership.

### **Typical Applications**
– **Industrial Machinery:** CNC spindles, pumps, compressors, and robotics.
– **Automotive Systems:** Wheel hubs, transmissions, electric vehicle (EV) motors, and steering systems.
– **Precision Equipment:** Medical devices, aerospace actuators, and semiconductor manufacturing tools.

For industries that demand **precision, durability, and efficiency**, NTN’s **Angular Contact Ball Bearings** provide a proven solution, backed by decades of engineering expertise and rigorous quality control. Whether in high-speed automation or heavy-load automotive applications, NTN ensures optimal performance under the most demanding conditions.

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Part Number d D B r Mass
7908CDLLB
40.000 mm
62.000 mm
12.000 mm
0.600 mm
7909ADLLB
45.000 mm
68.000 mm
12.000 mm
0.600 mm
7909CDLLB
45.000 mm
68.000 mm
12.000 mm
0.600 mm
7910ADLLB
50.000 mm
72.000 mm
12.000 mm
0.600 mm
7910CDLLB
50.000 mm
72.000 mm
12.000 mm
0.600 mm
7905ADLLB
25.000 mm
42.000 mm
9.000 mm
0.300 mm
7905CDLLB
25.000 mm
42.000 mm
9.000 mm
0.300 mm
7906ADLLB
30.000 mm
47.000 mm
9.000 mm
0.300 mm
7010ADLLB
50.000 mm
80.000 mm
16.000 mm
1.000 mm
7906CDLLB
30.000 mm
47.000 mm
9.000 mm
0.300 mm
7010CDLLB
50.000 mm
80.000 mm
16.000 mm
1.000 mm
7907ADLLB
35.000 mm
55.000 mm
10.000 mm
0.300 mm
71903CDLLBG/GNP42
17.000 mm
30.000 mm
7.000 mm
0.300 mm
0.019 kg
7907CDLLB
35.000 mm
55.000 mm
10.000 mm
0.600 mm
7900ADLLB
10.000 mm
22.000 mm
6.000 mm
0.300 mm
7908ADLLB
40.000 mm
62.000 mm
12.000 mm
0.600 mm
7900CDLLB
10.000 mm
22.000 mm
6.000 mm
0.300 mm
7901ADLLB
12.000 mm
24.000 mm
6.000 mm
0.300 mm
7901CDLLB
12.000 mm
24.000 mm
6.000 mm
0.300 mm
7902ADLLB
15.000 mm
28.000 mm
7.000 mm
0.300 mm