Extra Small Ball Bearings and Miniature Ball Bearings Inch Series

**Introduction to NSK’s Extra Small and Miniature Ball Bearings (Inch Series)**

NSK’s precision motion and control technologies set the benchmark for reliability and performance in demanding applications, particularly with their **Extra Small Ball Bearings and Miniature Ball Bearings (Inch Series)**. Designed for compact, high-speed, and high-precision environments, these deep groove ball bearings deliver exceptional durability, smooth operation, and energy efficiency—critical for industries where space constraints and operational precision are paramount.

### **Technical Features & Performance Advantages**
NSK’s **Inch-Series Miniature Bearings** are engineered to meet stringent tolerances while maintaining low friction and high rotational accuracy. Key features include:

– **Compact & Lightweight Design**: With bore sizes ranging from **1/8 inch (0.125″) up to 1 inch**, these bearings are ideal for applications where space and weight are critical factors.
– **High-Speed Capability**: Optimized internal geometries and premium-grade steel ensure stable performance at elevated speeds, reducing heat generation and wear.
– **Low Torque & Noise**: Precision-ground raceways and high-quality steel balls minimize vibration and acoustic noise, making them suitable for sensitive instrumentation.
– **Sealed & Shielded Options**: Available with rubber seals or metal shields to protect against contamination while retaining lubrication for extended service life.
– **Corrosion-Resistant Materials**: Options include stainless steel (AISI 440C) for harsh environments, ensuring longevity in medical, aerospace, and food-processing applications.

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

– **Industrial Machinery**: Small motors, encoders, and robotics where compact, high-speed bearings are essential for precise motion control.
– **Automotive Systems**: Electric power steering (EPS), sensors, and fuel pumps, where durability and low friction enhance efficiency.
– **Medical & Dental Equipment**: High-speed handpieces, imaging devices, and surgical tools requiring smooth, vibration-free operation.
– **Aerospace & Defense**: Guidance systems, drones, and avionics where lightweight, high-performance bearings are critical.
– **Consumer Electronics**: Precision cooling fans, hard disk drives, and small appliances that demand silent, long-lasting performance.

### **Why Choose NSK?**
NSK combines advanced materials science, precision manufacturing, and rigorous testing to ensure these bearings meet the highest industry standards. Whether for high-speed automation, medical devices, or automotive innovations, NSK’s **Inch-Series Miniature Ball Bearings** provide unmatched performance in the most demanding applications.

For engineers and designers seeking **compact, reliable, and high-precision motion solutions**, NSK’s deep groove miniature bearings represent the ideal choice—delivering efficiency, longevity, and superior control in even the most constrained spaces.

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Designations Nominal Dimensions Basic Load Ratings Speeds
Limiting Speeds
d
mm
D
mm
B
mm
r(min.)
mm
Cr
N
C0r
N
Grease
min-1
Oil (Oil-bath)
min-1
R166ZZ
4.762
9.525
3.175
0.1
780
270
50000