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
7018A5SN24
90
140
24
1.5
1
85.5
63.0
11400
17000
7018C
90
140
24
1.5
1
90.5
69.0
10000
15300
7018CSN24
90
140
24
1.5
1
90.5
66.5
13100
19900
7218A
90
160
30
2
1
142
96.5
6000
8000
7218A5
90
160
30
2
1
147
100
8000
12000
7218A5SN24
90
160
30
2
1
147
95.5
10400
15600
7218C
90
160
30
2
1
155
105
9200
14000
7218CSN24
90
160
30
2
1
154
100
12000
18300
7919A5
95
130
18
1.1
0.6
50.0
45.5
8900
13400
7919A5SN24
95
130
18
1.1
0.6
50.0
43.0
11600
17400
7919C
95
130
18
1.1
0.6
53.0
48.0
10300
15600
7919CSN24
95
130
18
1.1
0.6
53.0
45.5
13400
20300
7019A
95
145
24
1.5
1
84.0
67.0
6300
8400
7019A5
95
145
24
1.5
1
87.5
69.5
8400
12500
7019A5SN24
95
145
24
1.5
1
88.0
66.5
10900
16300
7019C
95
145
24
1.5
1
92.5
73.0
9600
14600
7019CSN24
95
145
24
1.5
1
93.0
70.5
12500
19000
7219A
95
170
32
2.1
1.1
154
103
5700
7600
7219A5
95
170
32
2.1
1.1
159
107
7600
11400
7219A5SN24
95
170
32
2.1
1.1
160
103
9900
14800
7219C
95
170
32
2.1
1.1
167
112
8700
13300
7219CSN24
95
170
32
2.1
1.1
168
107
11400
17300
7014A
70
110
20
1.1
0.6
53.5
39.5
8400
11200
7014A5
70
110
20
1.1
0.6
56.0
41.0
11200
16700