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
7205BEAT85
25
52
15
1
0.6
18400
10200
12000
17000
7306BEAMR
30
72
19
1.1
0.6
38000
20600
9000
13000
7208BW
40
80
18
1.1
0.6
35500
23000
5300
7500
7205BEAT7
25
52
15
1
0.6
18400
10200
12000
17000
7306BEAT7
30
72
19
1.1
0.6
38000
20600
9000
13000
7208BEAT85
40
80
18
1.1
0.6
40500
24500
7500
11000
7305AW
25
62
17
1.1
0.6
29100
15800
8500
11000
7007AW
35
62
14
1
0.6
20100
13400
9000
13000
7208BEAMR
40
80
18
1.1
0.6
40500
24500
7500
11000
7305BW
25
62
17
1.1
0.6
26800
14600
7500
10000
7207AW
35
72
17
1.1
0.6
32500
20100
8500
12000
7208BEAT7
40
80
18
1.1
0.6
40500
24500
7500
11000
7305BEAT85
25
62
17
1.1
0.6
28400
14900
10000
15000
7207BW
35
72
17
1.1
0.6
29800
18400
6000
8000
7308AW
40
90
23
1.5
1
53500
33000
5600
7500
7305BEAMR
25
62
17
1.1
0.6
28400
14900
10000
15000
7207BEAT85
35
72
17
1.1
0.6
34000
19600
8500
12000
7308BW
40
90
23
1.5
1
49500
30500
5000
6700
7305BEAT7
25
62
17
1.1
0.6
28400
14900
10000
15000
7207BEAMR
35
72
17
1.1
0.6
34000
19600
8500
12000
7308BEAT85
40
90
23
1.5
1
55500
33000
7100
10000
7202BEAT85
15
35
11
0.6
0.3
10200
4800
18000
26000
7204BEAT7
20
47
14
1
0.6
16300
8150
13000
19000
7000AW
10
26
8
0.3
0.15
5900
2600
24000
34000