Extra Small Ball Bearings and Miniature Ball Bearings Inch Series With Flamge

# NSK Extra Small and Miniature Ball Bearings (Inch Series with Flange): Precision Motion Solutions for Demanding Applications

NSK’s Extra Small Ball Bearings and Miniature Ball Bearings (Inch Series with Flange) represent the pinnacle of precision engineering, offering unmatched performance in compact, high-speed, and high-accuracy applications. Designed for industries where space constraints and reliability are critical, these deep groove ball bearings deliver smooth motion, reduced friction, and extended service life—even in the most demanding environments.

## **Technical Features & Performance Advantages**

### **1. Ultra-Compact Design with High Load Capacity**
NSK’s Extra Small and Miniature Ball Bearings are engineered for applications requiring minimal radial and axial space. Despite their small size, they maintain high load-carrying capacity due to optimized raceway geometry and high-quality steel construction. The deep groove design ensures efficient distribution of radial and axial loads, making them ideal for precision mechanisms.

### **2. Flange-Enhanced Stability & Easy Mounting**
The **integral flange** on these bearings provides secure axial positioning, preventing misalignment during operation. This feature simplifies installation in compact assemblies—such as small motors, medical devices, and robotics—where precise alignment is crucial. The flange also enhances rigidity, reducing vibration and improving overall system stability.

### **3. High-Speed Performance with Low Torque**
Precision-ground balls and raceways minimize friction, enabling smooth rotation at high speeds. Advanced lubrication options, including grease-for-life or specialty oils, further enhance performance in high-RPM applications such as miniature spindles, dental handpieces, and small gearboxes.

### **4. Superior Material & Corrosion Resistance**
NSK utilizes high-grade stainless steel or specialty alloys to ensure durability in harsh conditions. Optional coatings and seals provide additional protection against dust, moisture, and chemical exposure, making these bearings suitable for medical, aerospace, and food-processing equipment.

## **Typical Applications**
Due to their precision and reliability, NSK’s Extra Small and Miniature Ball Bearings (Inch Series with Flange) are widely used in:

– **Industrial Automation & Robotics:** Small actuators, servo motors, and articulated arms requiring precise motion control.
– **Medical & Dental Equipment:** High-speed handpieces, imaging devices, and surgical robots where smooth, vibration-free operation is critical.
– **Aerospace & Defense:** Guidance systems, UAV mechanisms, and avionics requiring lightweight, high-reliability bearings.
– **Automotive Electronics:** Sensors, throttle systems, and electric fuel pumps where compact, long-lasting bearings are essential.
– **Consumer Electronics:** Precision motors in drones, cameras, and small appliances.

## **Conclusion**
NSK’s Extra Small and Miniature Ball Bearings (Inch Series with Flange) combine precision engineering with robust performance, making them the ideal choice for applications where space, speed, and reliability are non-negotiable. With superior load capacity, high-speed capability, and easy mounting features, these bearings ensure optimal performance in the most challenging environments. Whether in medical devices, industrial automation, or aerospace systems, NSK delivers motion solutions that drive efficiency and longevity.

For engineers and designers seeking high-performance miniature bearings, NSK’s advanced technology provides the perfect balance of precision, durability, and compact design.

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Designations Nominal Dimensions Basic Load Ratings Speeds
Limiting Speeds
d
mm
D
mm
D1,2
mm
B
mm
C1,2
mm
r(min.)
mm
Cr
N
C0r
N
Grease
min-1
FR144ZZ
3.175
6.35
7.518
2.779
0.787
0.1
310
95
67000
FR168BZZ
6.35
9.525
10.719
3.175
0.914
0.1
460
173
48000
FR2-5
3.175
7.938
9.119
2.779
0.584
0.1
615
179
60000
FR188
6.35
12.7
13.894
3.175
0.584
0.15
1190
440
40000
FR2-5ZZ
3.175
7.938
9.119
3.571
0.787
0.1
615
179
60000
FR188ZZ
6.35
12.7
13.894
4.762
1.143
0.15
1190
440
40000
FR2-6
3.175
9.525
10.719
2.779
0.584
0.15
705
225
53000
FR4B
6.35
15.875
17.526
4.978
1.067
0.3
1770
615
38000
FR2-6ZZS
3.175
9.525
10.719
3.571
0.787
0.15
705
225
53000
FR4BZZ
6.35
15.875
17.526
4.978
1.067
0.3
1770
615
38000
FR0
1.191
3.967
5.156
1.588
0.33
0.1
153
35
110000
FR2
3.175
9.525
11.176
3.967
0.762
0.3
695
218
56000
FR1810
7.938
12.7
13.894
3.967
0.787
0.15
595
276
40000
FR0ZZ
1.191
3.967
5.156
2.38
0.787
0.1
153
35
110000
FR2ZZ
3.175
9.525
11.176
3.967
0.762
0.3
695
218
56000
FR1810ZZ
7.938
12.7
13.894
3.967
0.787
0.15
595
276
40000
FR1
1.397
4.762
5.944
1.984
0.584
0.1
255
66
90000
FR155
3.967
7.938
9.119
2.779
0.584
0.1
395
149
53000
FR6
9.525
22.225
24.613
5.558
1.57
0.4
3650
1410
32000
FR1ZZ
1.397
4.762
5.944
2.779
0.787
0.1
255
66
90000