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
7222A5
110
200
38
2.1
1.1
211
153
6500
9700
7222C
110
200
38
2.1
1.1
222
160
7500
11300
7924A5
120
165
22
1.1
0.6
85.5
77.0
7100
10600
7924A5SN24
120
165
22
1.1
0.6
85.5
73.5
9200
13700
7924C
120
165
22
1.1
0.6
90.5
81.0
8100
12300
7924CSN24
120
165
22
1.1
0.6
90.5
77.5
10600
16000
7917C
85
120
18
1.1
0.6
49.0
40.5
11300
17100
7917CSN24
85
120
18
1.1
0.6
48.5
38.5
14700
22300
7017A
85
130
22
1.1
0.6
69.0
53.5
7000
9400
7017A5
85
130
22
1.1
0.6
71.5
55.5
9400
14000
7017A5SN24
85
130
22
1.1
0.6
71.5
53.0
12100
18200
7017C
85
130
22
1.1
0.6
76.0
58.5
10700
16300
7017CSN24
85
130
22
1.1
0.6
75.5
55.5
14000
21300
7217A
85
150
28
2
1
124
83.5
6400
8600
7217A5
85
150
28
2
1
129
86.5
8600
12800
7217A5SN24
85
150
28
2
1
129
83.0
11100
16600
7217C
85
150
28
2
1
135
90.5
9800
14900
7217CSN24
85
150
28
2
1
135
87.0
12800
19500
7918A5
90
125
18
1.1
0.6
49.5
43.5
9400
14000
7918A5SN24
90
125
18
1.1
0.6
49.0
41.0
12100
18200
7918C
90
125
18
1.1
0.6
52.5
46.0
10700
16300
7918CSN24
90
125
18
1.1
0.6
52.0
43.5
14000
21300
7018A
90
140
24
1.5
1
82.0
63.5
6600
8700
7018A5
90
140
24
1.5
1
85.5
65.5
8700
13100