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
7972A5
360
480
56
3
1.1
435
615
2200
3400
7072A
360
540
82
5
2
670
960
1500
2000
7072A5
360
540
82
5
2
700
995
2000
3200
7976A
380
520
65
4
1.5
490
725
1500
2000
7980A
400
540
65
4
1.5
495
750
1400
2000
7080A
400
600
90
5
2
700
1010
1300
1800
7984A
420
560
65
4
1.5
515
805
1400
1900
7984C
420
560
65
4
1.5
570
890
2200
3400
7084A
420
620
90
5
2
770
1190
1300
1800
7968A
340
460
56
3
1.1
415
565
1700
2300
7968A5
340
460
56
3
1.1
430
590
2300
3500
7968C
340
460
56
3
1.1
460
625
2700
4200
7068A
340
520
82
5
2
655
905
1600
2100
7268A
340
620
92
6
3
850
1260
1400
1900
7044A
220
340
56
3
1.1
355
395
2400
3300
7056A
280
420
65
4
1.5
430
530
1900
2600
7044C
220
340
56
3
1.1
390
430
3800
5900
7960A
300
420
56
3
1.1
395
500
1900
2500
7244A
220
400
65
4
1.5
515
585
2100
3000
7960A5
300
420
56
3
1.1
410
520
2500
3900