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
7001A
12
28
8
0.3
0.15
6.85
2.71
37500
50000
7001A5
12
28
8
0.3
0.15
7.05
2.79
50000
75000
7001A5SN24
12
28
8
0.3
0.15
6.90
2.61
65000
97500
7001C
12
28
8
0.3
0.15
7.30
2.90
57500
87500
7001CSN24
12
28
8
0.3
0.15
7.20
2.71
75000
114000
7201A
12
32
10
0.6
0.3
9.40
3.65
34100
45500
7201A5
12
32
10
0.6
0.3
9.65
3.70
45500
68200
7201A5SN24
12
32
10
0.6
0.3
9.50
3.50
59100
88700
7201C
12
32
10
0.6
0.3
9.95
3.85
52300
79600
7201CSN24
12
32
10
0.6
0.3
9.85
3.60
68200
104000
7902A5
15
28
7
0.3
0.15
5.75
2.53
46600
69800
7902A5SN24
15
28
7
0.3
0.15
5.85
2.49
60500
90700
7902C
15
28
7
0.3
0.15
6.00
2.64
53500
81400
7902CSN24
15
28
7
0.3
0.15
6.15
2.61
69800
106000
7002A
15
32
9
0.3
0.15
7.30
3.15
32000
42600
7002A5
15
32
9
0.3
0.15
7.55
3.25
42600
63900
7002A5SN24
15
32
9
0.3
0.15
7.40
3.05
55400
83000
7002C
15
32
9
0.3
0.15
7.85
3.40
49000
74500
7002CSN24
15
32
9
0.3
0.15
7.75
3.15
63900
97100
7202A
15
35
11
0.6
0.3
10.2
4.25
30000
40000
7202A5
15
35
11
0.6
0.3
10.5
4.35
40000
60000
7202A5SN24
15
35
11
0.6
0.3
10.4
4.10
52000
78000