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
7944CSN24
220
300
38
2.1
1.1
240
246
5400
8400
7956C
280
380
46
2.1
1.1
340
410
3200
5000
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
7932CSN24
160
220
28
2
1
134
127
7400
11500
7936A5
180
250
33
2
1
172
174
4200
6600
7238C
190
340
55
4
1.5
435
450
4000
6300
7032A
160
240
38
2.1
1.1
195
176
3300
4500
7936A5SN24
180
250
33
2
1
173
167
5600
8700
7032A5
160
240
38
2.1
1.1
204
183
4500
7000
7936C
180
250
33
2
1
183
184
4900
7700
7032A5SN24
160
240
38
2.1
1.1
204
176
6000
9300
7936CSN24
180
250
33
2
1
183
177
6600
10200
7032C
160
240
38
2.1
1.1
215
193
5300
8300
7036A
180
280
46
2.1
1.1
261
252
2900
4000
7032CSN24
160
240
38
2.1
1.1
216
185
7000
10900
7036A5
180
280
46
2.1
1.1
272
262
4000
6100
7232A
160
290
48
3
1.1
330
305
2900
4000
7036C
180
280
46
2.1
1.1
287
276
4600
7200
7934A5
170
230
28
2
1
134
140
4500
7000
7236A
180
320
52
4
1.5
385
385
2600
3600
7934A5SN24
170
230
28
2
1
134
134
6000
9300