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
7005CSN24
25
47
12
0.6
0.3
14.8
7.15
41700
63400
7003A5
17
35
10
0.3
0.15
7.95
3.65
38500
57700
7004C
20
42
12
0.6
0.3
14.0
6.55
37100
56500
7205A
25
52
15
1
0.6
19.4
9.45
19500
26000
7003A5SN24
17
35
10
0.3
0.15
7.80
3.40
50000
75000
7004CSN24
20
42
12
0.6
0.3
14.1
6.30
48400
73600
7003C
17
35
10
0.3
0.15
8.35
3.80
44300
67400
7204A
20
47
14
1
0.6
17.1
7.55
22400
29900
7003CSN24
17
35
10
0.3
0.15
8.20
3.55
57700
87700
7204A5
20
47
14
1
0.6
17.6
7.75
29900
44800
7203A
17
40
12
0.6
0.3
12.8
5.45
26400
35100
7204A5SN24
20
47
14
1
0.6
17.5
7.35
38900
58300
7203A5
17
40
12
0.6
0.3
13.2
5.60
35100
52700
7204C
20
47
14
1
0.6
18.3
8.05
34400
52300
7000A5
10
26
8
0.3
0.15
6.50
2.41
55600
83400
7001C
12
28
8
0.3
0.15
7.30
2.90
57500
87500
7202A
15
35
11
0.6
0.3
10.2
4.25
30000
40000
7000A5SN24
10
26
8
0.3
0.15
6.40
2.25
72300
108000
7001CSN24
12
28
8
0.3
0.15
7.20
2.71
75000
114000
7202A5
15
35
11
0.6
0.3
10.5
4.35
40000
60000