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
7317BEAMR
85
180
41
3
1.1
172000
133000
3400
5000
7317BEAT7
85
180
41
3
1.1
172000
133000
3400
5000
7018AW
90
140
24
1.5
1
74000
66500
3800
5300
7218AW
90
160
30
2
1
130000
103000
3600
4800
7218BW
90
160
30
2
1
117000
94000
2600
3400
7218BEAT85
90
160
30
2
1
120000
93500
3600
5300
7218BEAMR
90
160
30
2
1
120000
93500
3600
5300
7318AW
90
190
43
3
1.1
188000
147000
2600
3400
7318BW
90
190
43
3
1.1
172000
135000
2200
3000
7318BEAT85
90
190
43
3
1.1
186000
146000
3200
4500
7318BEAMR
90
190
43
3
1.1
186000
146000
3200
4500
7019A
95
145
24
1.5
1
73500
67000
4500
6300
7219AW
95
170
32
2.1
1.1
141000
111000
3400
4500
7219BW
95
170
32
2.1
1.1
127000
101000
2400
3200
7219BEAT85
95
170
32
2.1
1.1
136000
107000
3400
5000
7219BEAMR
95
170
32
2.1
1.1
136000
107000
3400
5000
7219BEAT7
95
170
32
2.1
1.1
136000
107000
3400
5000
7319AW
95
200
45
3
1.1
201000
162000
2400
3200
7319BW
95
200
45
3
1.1
184000
149000
2200
3000
7319BEAT85
95
200
45
3
1.1
198000
160000
3000
4500
7319BEAMR
95
200
45
3
1.1
198000
160000
3000
4500
7212BW
60
110
22
1.5
1
61500
44500
3800
5300
7212BEAT85
60
110
22
1.5
1
64500
45000
5300
7500
7212BEAMR
60
110
22
1.5
1
64500
45000
5300
7500