Double Row Angular Contact Ball Bearings

**NTN Angular Contact Ball Bearings: Precision Performance for Demanding Applications**

NTN is a globally recognized leader in bearing technology, delivering high-performance solutions for industrial machinery, automotive systems, and precision equipment. Among its extensive product range, NTN’s **Angular Contact Ball Bearings** and **Double Row Angular Contact Ball Bearings** stand out for their ability to handle combined radial and axial loads with exceptional accuracy, durability, and efficiency. These bearings are engineered to meet the rigorous demands of high-speed operations, heavy-load conditions, and applications requiring precise rotational control.

### **Technical Features & Design Advantages**
NTN’s **Single Row Angular Contact Ball Bearings** are designed with a contact angle (typically 15°, 25°, 30°, or 40°) that enables them to support significant axial loads in one direction while accommodating moderate radial loads. The optimized raceway geometry and high-quality steel construction minimize friction, reduce heat generation, and extend service life. These bearings are available in various configurations, including:
– **Standard (non-separable) designs** for general applications
– **Split inner ring designs** for easier assembly in complex machinery
– **High-speed variants** with ceramic hybrid options for reduced centrifugal forces

For applications requiring higher load capacity and rigidity, NTN’s **Double Row Angular Contact Ball Bearings** provide a compact solution. They combine two single-row bearings into a single unit, offering enhanced axial and radial load support in both directions. Their stiffened internal structure ensures stability in precision machinery, while advanced sealing options improve contamination resistance.

### **Performance Benefits**
– **Superior Load Handling:** The angular contact design efficiently manages combined loads, making these bearings ideal for applications with significant thrust forces.
– **High-Speed Capability:** Precision-ground raceways and advanced cage designs (e.g., pressed steel or polyamide) ensure smooth operation at elevated speeds.
– **Enhanced Rigidity & Accuracy:** Double-row variants reduce deflection under heavy loads, critical for machine tools and robotics.
– **Extended Service Life:** NTN’s proprietary heat treatment and surface finishing technologies minimize wear and fatigue.

### **Typical Applications**
NTN’s angular contact ball bearings are widely used in:
– **Industrial Machinery:** CNC spindles, pumps, compressors, and gearboxes
– **Automotive Systems:** Wheel hubs, transmissions, and electric vehicle motors
– **Precision Equipment:** Robotics, medical devices, and aerospace actuators

By combining advanced engineering with rigorous quality control, NTN ensures that its angular contact ball bearings deliver unmatched reliability, even in the most demanding environments. Whether optimizing industrial productivity or enhancing automotive performance, NTN’s solutions provide the precision and durability needed for superior operational efficiency.

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Part Number d D B r Mass
3310
50.000 mm
110.000 mm
44.400 mm
2.000 mm
3310C3
50.000 mm
110.000 mm
44.400 mm
2.000 mm
1.893 kg
3310NRC3
50.000 mm
110.000 mm
44.400 mm
3.000 mm
1.917 kg
3311
55.000 mm
120.000 mm
49.200 mm
2.000 mm
2.514 kg
3311C3
55.000 mm
120.000 mm
49.200 mm
2.000 mm
2.470 kg
3311NR
55.000 mm
120.000 mm
49.200 mm
2.000 mm
3306EC3
30.000 mm
72.000 mm
30.200 mm
1.100 mm
3220
100.000 mm
180.000 mm
60.300 mm
2.100 mm
3306NR
30.000 mm
72.000 mm
30.200 mm
1.100 mm
3222
110.000 mm
200.000 mm
69.800 mm
N/A
8.690 kg
3307
35.000 mm
80.000 mm
34.900 mm
1.500 mm
3222C3
69.850 mm
200.000 mm
69.850 mm
2.032 mm
8.690 kg
3307C3
35.000 mm
80.000 mm
34.900 mm
1.500 mm
0.784 kg
3302
15.000 mm
42.000 mm
19.000 mm
1.000 mm
3308
40.000 mm
90.000 mm
36.500 mm
1.500 mm
1.065 kg
3303
17.000 mm
47.000 mm
22.200 mm
1.000 mm
0.192 kg
3304
20.000 mm
52.000 mm
22.200 mm
1.100 mm
3304B
20.000 mm
52.000 mm
22.200 mm
1.000 mm
0.230 kg
3304C3
20.000 mm
52.000 mm
22.200 mm
1.100 mm
0.229 kg
3305
25.000 mm
62.000 mm
25.400 mm
1.100 mm
0.368 kg