Standard Series High Precision Angular Contact Ball Bearings

**Introduction to NSK Super Precision Angular Contact Ball Bearings – Standard Series**

In the realm of high-performance motion control, precision is paramount. NSK’s **Super Precision Angular Contact Ball Bearings (Standard Series)** represent the pinnacle of engineering excellence, delivering unmatched accuracy, rigidity, and reliability for demanding applications across industries. Designed to meet the exacting requirements of advanced machinery, automotive systems, and precision equipment, these bearings combine cutting-edge materials, meticulous manufacturing tolerances, and optimized geometries to ensure superior performance in high-speed, high-load, and ultra-precise environments.

### **Technical Features & Design Innovations**
NSK’s **Standard Series Super Precision Angular Contact Ball Bearings** are engineered with a focus on minimizing friction, reducing heat generation, and maintaining dimensional stability under extreme operating conditions. Key features include:

– **Ultra-Precise Raceway Grinding:** Advanced grinding techniques ensure raceway surfaces with minimal form error, enhancing rotational accuracy and smooth motion.
– **Optimized Contact Angles (15° & 25°):** The bearings are available in multiple contact angle configurations, allowing engineers to select the ideal balance between axial and radial load capacity.
– **High-Grade Materials:** Manufactured from premium bearing steel (or optional ceramic hybrid options), these bearings resist wear, fatigue, and thermal deformation.
– **Preloaded Options:** Matched bearing sets with controlled preload minimize axial and radial play, improving rigidity for applications requiring zero backlash.
– **Special Cage Designs:** Glass fiber-reinforced polyamide (PA66) or machined brass cages reduce friction, dampen vibration, and extend service life.

### **Performance Advantages**
NSK’s Super Precision Angular Contact Ball Bearings excel where conventional bearings fall short, offering:

– **Exceptional Rotational Accuracy:** Achieve runout tolerances as low as **1 μm** or less, critical for spindle motors, CNC machines, and optical systems.
– **High-Speed Capability:** Advanced lubrication and cage designs enable stable operation at **DN values exceeding 1.5 million** (mm·rpm).
– **Enhanced Rigidity & Load Capacity:** The optimized internal geometry distributes loads evenly, reducing deformation under heavy axial/radial forces.
– **Long Service Life:** Precision manufacturing and superior materials reduce wear, even in contaminated or high-temperature environments.

### **Typical Applications**
These bearings are indispensable in industries where precision and reliability are non-negotiable:

– **Machine Tools:** High-speed spindles, CNC machining centers, and grinding machines rely on NSK bearings for micron-level accuracy.
– **Automotive Systems:** Turbochargers, electric vehicle (EV) motor shafts, and steering systems benefit from low friction and high durability.
– **Robotics & Automation:** Articulated arms, rotary tables, and linear actuators demand the rigidity and repeatability of NSK’s precision bearings.
– **Aerospace & Medical Equipment:** From aircraft gyroscopes to MRI scanners, these bearings ensure smooth, vibration-free motion.

### **Conclusion**
NSK’s **Super Precision Angular Contact Ball Bearings (Standard Series)** set the benchmark for performance in precision motion control. By integrating advanced materials, exacting manufacturing standards, and innovative design, they empower engineers to push the boundaries of speed, accuracy, and reliability in the most challenging applications. Whether in industrial automation, high-performance automotive systems, or cutting-edge medical devices, NSK’s bearings deliver the precision that drives progress.

For mission-critical applications where failure is not an option, NSK’s Super Precision Bearings provide the confidence of **engineered perfection**.

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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
kN
C0r
kN
Grease
min-1
Oil (Oil-air)
min-1
7209C
45
85
19
1.1
0.6
51.5
28.8
17700
27000
7209CSN24
45
85
19
1.1
0.6
51.5
27.8
23100
35100
7910A5
50
72
12
0.6
0.3
20.1
14.2
16400
24600
7910A5SN24
50
72
12
0.6
0.3
20.0
13.5
21400
32000
7910C
50
72
12
0.6
0.3
21.3
15.0
18900
28700
7910CSN24
50
72
12
0.6
0.3
21.2
14.3
24600
37400
7010A
50
80
16
1
0.6
29.8
20.1
11600
15400
7010A5
50
80
16
1
0.6
31.0
20.8
15400
23100
7010A5SN24
50
80
16
1
0.6
31.0
19.9
20000
30000
7010C
50
80
16
1
0.6
32.5
21.9
17700
27000
7010CSN24
50
80
16
1
0.6
32.5
21.0
23100
35100
7210A
50
90
20
1.1
0.6
49.5
29.3
10800
14300
7210A5
50
90
20
1.1
0.6
51.5
30.5
14300
21500
7210A5SN24
50
90
20
1.1
0.6
52.0
29.3
17900
26900
7210C
50
90
20
1.1
0.6
54.0
31.5
16500
25000
7210CSN24
50
90
20
1.1
0.6
54.5
30.5
20600
31300
7911A5
55
80
13
1
0.6
22.8
16.8
14900
22300
7911A5SN24
55
80
13
1
0.6
23.1
16.4
19300
28900
7911C
55
80
13
1
0.6
24.1
17.7
17100
26000
7911CSN24
55
80
13
1
0.6
24.5
17.3
22300
33800
7011A
55
90
18
1.1
0.6
39.0
26.3
10400
13800
7011A5
55
90
18
1.1
0.6
41.0
27.2
13800
20700
7205A5
25
52
15
1
0.6
20.0
9.80
26000
39000
7205A5SN24
25
52
15
1
0.6
19.9
9.25
33800
50700