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
7014A5SN24
70
110
20
1.1
0.6
56.0
39.0
14500
21700
7014C
70
110
20
1.1
0.6
59.0
43.0
12800
19500
7014CSN24
70
110
20
1.1
0.6
59.0
41.5
16700
25400
7214A
70
125
24
1.5
1
92.0
59.5
7700
10300
7214A5
70
125
24
1.5
1
95.5
61.5
10300
15400
7214A5SN24
70
125
24
1.5
1
95.5
59.0
13400
20000
7214C
70
125
24
1.5
1
100
64.5
11800
18000
7214CSN24
70
125
24
1.5
1
100
61.5
15400
23400
7915A5
75
105
16
1
0.6
34.0
27.7
11200
16700
7915A5SN24
75
105
16
1
0.6
34.0
26.5
14500
21700
7915C
75
105
16
1
0.6
36.0
29.3
12800
19500
7915CSN24
75
105
16
1
0.6
36.0
28.0
16700
25400
7015A
75
115
20
1.1
0.6
55.0
41.5
7900
10600
7015A5
75
115
20
1.1
0.6
57.0
43.5
10600
15800
7015A5SN24
75
115
20
1.1
0.6
57.5
41.5
13700
20600
7015C
75
115
20
1.1
0.6
60.5
45.5
12200
18500
7015CSN24
75
115
20
1.1
0.6
60.5
44.0
15800
24000
7215A
75
130
25
1.5
1
95.5
64.5
7400
9800
7215A5
75
130
25
1.5
1
99.5
66.5
9800
14700
7215A5SN24
75
130
25
1.5
1
99.5
63.5
12700
19100
7215C
75
130
25
1.5
1
104
70.0
11300
17100
7215CSN24
75
130
25
1.5
1
104
67.0
14700
22300
7916A5
80
110
16
1
0.6
34.5
29.0
10600
15800
7916A5SN24
80
110
16
1
0.6
34.5
27.8
13700
20600