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
7232A
160
290
48
3
1.1
289000
305000
1900
2600
7238B
190
340
55
4
1.5
310000
375000
1400
2000
7232B
160
290
48
3
1.1
261000
279000
1700
2400
7338A
190
400
78
5
2
495000
600000
1400
1900
7332A
160
340
68
4
1.5
380000
420000
1700
2200
7338B
190
400
78
5
2
455000
550000
1300
1700
7326A
130
280
58
4
1.5
300000
293000
2200
2800
7332B
160
340
68
4
1.5
350000
385000
1500
2000
7040A
200
310
51
2.1
1.1
264000
310000
1700
2200
7326B
130
280
58
4
1.5
275000
268000
1900
2600
7034A
170
260
42
2.1
1.1
204000
214000
2000
2600
7240A
200
360
58
4
1.5
370000
450000
1500
2000
7028A
140
210
33
2
1
132000
133000
3200
4300
7234A
170
310
52
4
1.5
325000
360000
1800
2400
7240B
200
360
58
4
1.5
335000
410000
1300
1800
7228A
140
250
42
3
1.1
240000
234000
2200
3000
7234B
170
310
52
4
1.5
293000
325000
1600
2200
7340A
200
420
80
5
2
520000
660000
1300
1800
7228B
140
250
42
3
1.1
217000
213000
2000
2800
7334A
170
360
72
4
1.5
425000
485000
1600
2200