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
7211AW
55
100
21
1.5
1
56000
39500
5600
8000
7309BEAW
45
100
25
1.5
1
65500
39500
4500
6000
7211BEAT85
55
100
21
1.5
1
54000
37000
6000
8500
7010AW
50
80
16
1
0.6
26900
21100
6700
9500
7211BEAMR
55
100
21
1.5
1
54000
37000
6000
8500
7006AW
30
55
13
1
0.6
16000
10100
11000
14000
7207BEAT7
35
72
17
1.1
0.6
34000
19600
8500
12000
7308BEAMR
40
90
23
1.5
1
55500
33000
7100
10000
7206AW
30
62
16
1
0.6
24800
14800
9500
13000
7307AW
35
80
21
1.5
1
44000
26300
6300
8500
7206BW
30
62
16
1
0.6
22600
13500
7100
9500
7307BW
35
80
21
1.5
1
40500
24200
5600
7500
7206BEAT85
30
62
16
1
0.6
24900
14300
10000
14000
7307BEAT85
35
80
21
1.5
1
42000
24400
8000
11000
7206BEAMR
30
62
16
1
0.6
24900
14300
10000
14000
7307BEAMR
35
80
21
1.5
1
42000
24400
8000
11000
7206BEAT7
30
62
16
1
0.6
24900
14300
10000
14000
7307BEAT7
35
80
21
1.5
1
42000
24400
8000
11000
7306AW
30
72
19
1.1
0.6
37000
20900
7100
9500
7307BEAW
35
80
21
1.5
1
42000
24400
5600
7500
7306BW
30
72
19
1.1
0.6
34000
19300
6300
8500
7008AW
40
68
15
1
0.6
21500
15400
8500
11000
7306BEAT85
30
72
19
1.1
0.6
38000
20600
9000
13000
7208AW
40
80
18
1.1
0.6
39000
25100
7500
10000