Single-Row Angular Contact Ball Bearings

**Introduction to NSK Single Row Angular Contact Ball Bearings: Precision Performance for Demanding Applications**

NSK’s Single Row Angular Contact Ball Bearings represent the pinnacle of precision motion and control technology, engineered to deliver exceptional performance in applications requiring high-speed operation, rigidity, and precise axial load handling. Designed with advanced materials, optimized geometries, and stringent manufacturing tolerances, these bearings are a critical component in industrial machinery, automotive systems, and high-precision equipment where reliability and efficiency are paramount.

### **Technical Features and Design Excellence**
Single Row Angular Contact Ball Bearings from NSK are distinguished by their unique internal design, featuring raceways that are offset relative to each other in the bearing axis direction. This configuration enables the bearing to support combined radial and axial loads—simultaneously or individually—with superior accuracy. Key technical features include:

– **Contact Angle Optimization**: Available in standard contact angles (typically 15°, 25°, 30°, or 40°), the bearings are tailored to balance thrust capacity and radial load performance. A steeper angle enhances axial load capacity, while a shallower angle improves high-speed capability.
– **Precision-Grade Manufacturing**: NSK employs ultra-precise grinding and super-finishing techniques to minimize friction, vibration, and noise, ensuring smooth operation even at extreme speeds.
– **High-Quality Materials**: Manufactured from premium bearing steel or specialty alloys (such as NSK’s proprietary HTF steel for high-temperature environments), these bearings resist wear, fatigue, and deformation under heavy loads.
– **Cage Designs**: Options include pressed steel, machined brass, or polymer cages (e.g., PEEK) to optimize performance in high-speed, high-temperature, or corrosive environments.

### **Performance Advantages**
NSK’s Single Row Angular Contact Ball Bearings excel in applications demanding precision and durability:

– **High-Speed Capability**: Low friction and optimized internal geometry allow for stable operation at elevated rotational speeds, critical for machine tool spindles and turbochargers.
– **Rigidity and Accuracy**: The bearings’ axial stiffness ensures minimal deflection under load, maintaining positional accuracy in CNC machines, robotics, and measuring instruments.
– **Extended Service Life**: Advanced heat treatment processes and surface coatings (such as NSK’s Super-TF treatment) enhance durability, reducing maintenance downtime in harsh industrial environments.

### **Typical Applications**
These bearings are indispensable across industries where precision motion control is essential:

– **Industrial Machinery**: Machine tool spindles, gearboxes, and pumps rely on these bearings for high-speed, high-precision rotation.
– **Automotive Systems**: Turbochargers, wheel hubs, and electric vehicle (EV) drivetrains benefit from their ability to handle dynamic loads and harsh operating conditions.
– **Aerospace and Robotics**: Used in actuators, flight control systems, and robotic joints, where compact design and reliability are critical.

By combining cutting-edge engineering with decades of expertise, NSK’s Single Row Angular Contact Ball Bearings provide unmatched performance, ensuring efficiency and longevity in the most demanding applications. Whether in high-speed automation or heavy-load industrial systems, NSK delivers the precision and reliability that industries trust.

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Designations Nominal Dimensions Basic Load Ratings Speeds
Limiting Speeds
d
mm
D
mm
B
mm
r(min.)
mm
r1(min.)
mm
Cr
N
C0r
N
Grease
min-1
Oil (Oil-bath)
min-1
7311BEAMR
55
120
29
2
1
93500
58500
5000
7500
7311BEAT7
55
120
29
2
1
93500
58500
5000
7500
7311BEAW
55
120
29
2
1
93500
58500
3600
5000
7012AW
60
95
18
1.1
0.6
36500
29500
5600
8000
7212AW
60
110
22
1.5
1
68000
48500
5300
7100
7205BEAT85
25
52
15
1
0.6
18400
10200
12000
17000
7205BEAT7
25
52
15
1
0.6
18400
10200
12000
17000
7305AW
25
62
17
1.1
0.6
29100
15800
8500
11000
7305BW
25
62
17
1.1
0.6
26800
14600
7500
10000
7305BEAT85
25
62
17
1.1
0.6
28400
14900
10000
15000
7305BEAMR
25
62
17
1.1
0.6
28400
14900
10000
15000
7305BEAT7
25
62
17
1.1
0.6
28400
14900
10000
15000
7006AW
30
55
13
1
0.6
16000
10100
11000
14000
7206AW
30
62
16
1
0.6
24800
14800
9500
13000
7206BW
30
62
16
1
0.6
22600
13500
7100
9500
7206BEAT85
30
62
16
1
0.6
24900
14300
10000
14000
7206BEAMR
30
62
16
1
0.6
24900
14300
10000
14000
7206BEAT7
30
62
16
1
0.6
24900
14300
10000
14000
7306AW
30
72
19
1.1
0.6
37000
20900
7100
9500
7306BW
30
72
19
1.1
0.6
34000
19300
6300
8500
7306BEAT85
30
72
19
1.1
0.6
38000
20600
9000
13000
7306BEAMR
30
72
19
1.1
0.6
38000
20600
9000
13000
7306BEAT7
30
72
19
1.1
0.6
38000
20600
9000
13000
7007AW
35
62
14
1
0.6
20100
13400
9000
13000