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
7236B
180
320
52
4
1.5
305000
350000
1500
2000
7336A
180
380
75
4
1.5
450000
535000
1500
2000
7336B
180
380
75
4
1.5
410000
490000
1300
1800
7038A
190
290
46
2.1
1.1
246000
280000
1800
2400
7238A
190
340
55
4
1.5
345000
410000
1600
2200
7238B
190
340
55
4
1.5
310000
375000
1400
2000
7338A
190
400
78
5
2
495000
600000
1400
1900
7338B
190
400
78
5
2
455000
550000
1300
1700
7040A
200
310
51
2.1
1.1
264000
310000
1700
2200
7240A
200
360
58
4
1.5
370000
450000
1500
2000
7240B
200
360
58
4
1.5
335000
410000
1300
1800
7340A
200
420
80
5
2
520000
660000
1300
1800
7340B
200
420
80
5
2
475000
600000
1200
1600
7020A
100
150
24
1.5
1
75000
70500
4500
6000
7220AW
100
180
34
2.1
1.1
158000
126000
3200
4300
7220BW
100
180
34
2.1
1.1
143000
114000
2200
3000
7220BEAT85
100
180
34
2.1
1.1
150000
122000
3200
4500
7220BEAMR
100
180
34
2.1
1.1
150000
122000
3200
4500
7320AW
100
215
47
3
1.1
228000
193000
2200
3000
7320BW
100
215
47
3
1.1
209000
178000
2000
2800
7320BEAT85
100
215
47
3
1.1
222000
187000
2800
4000
7320BEAMR
100
215
47
3
1.1
222000
187000
2800
4000
7320BEAT7
100
215
47
3
1.1
222000
187000
2800
4000
7021A
105
160
26
2
1
88000
81500
4300
5600