Expansion Compensating Bearings

**NTN Ball Bearings: High-Performance Deep Groove & Expansion Compensating Bearings for Demanding Applications**

NTN Corporation, a global leader in precision bearing technology, offers an extensive range of high-performance **Deep Groove Ball Bearings** and specialized **Expansion Compensating Bearings**, engineered to deliver exceptional reliability, durability, and efficiency in industrial, automotive, and precision applications. Designed with advanced materials, precision manufacturing, and innovative engineering, NTN’s bearings ensure optimal performance under varying loads, speeds, and environmental conditions.

### **Technical Features & Design Advantages**

#### **Deep Groove Ball Bearings**
NTN’s **Deep Groove Ball Bearings** are among the most versatile bearing solutions, featuring a simple yet robust design with deep raceway grooves that accommodate radial, axial, and combined loads. Key technical highlights include:
– **High-Speed Capability**: Optimized internal geometry and superior surface finishes minimize friction, enabling smooth operation at high rotational speeds.
– **Low Noise & Vibration**: Precision-ground balls and raceways reduce operational noise, making them ideal for electric motors, HVAC systems, and automotive components.
– **Sealed & Shielded Options**: Available with rubber seals (RS, 2RS) or metal shields (ZZ) for enhanced contamination protection and extended lubrication life.
– **Material Innovations**: High-grade chrome steel, stainless steel, or ceramic hybrid options provide corrosion resistance and extended service life in harsh environments.

#### **Expansion Compensating Bearings**
For applications requiring thermal expansion accommodation or shaft misalignment tolerance, NTN’s **Expansion Compensating Bearings** offer a specialized solution:
– **Axial Displacement Compensation**: Designed to absorb axial displacement caused by thermal expansion in long shafts, preventing premature bearing failure.
– **Self-Aligning Capability**: Accommodates minor shaft misalignments, reducing stress on adjacent components.
– **Robust Construction**: Reinforced cages and high-load capacity designs ensure stability in heavy machinery, conveyor systems, and automotive drivetrains.

### **Performance Benefits**
– **Extended Service Life**: Advanced heat treatment processes and premium lubricants enhance wear resistance.
– **Energy Efficiency**: Reduced friction lowers power consumption, contributing to sustainability in industrial and automotive systems.
– **Maintenance Reduction**: Sealed variants minimize relubrication needs, ideal for hard-to-access applications.

### **Typical Applications**
– **Industrial Machinery**: Pumps, compressors, gearboxes, and electric motors.
– **Automotive Systems**: Alternators, wheel hubs, transmissions, and EV components.
– **Precision Equipment**: Medical devices, robotics, and semiconductor manufacturing tools.

NTN’s **Deep Groove Ball Bearings** and **Expansion Compensating Bearings** exemplify the company’s commitment to innovation, ensuring superior performance in the most demanding operational environments. Whether for high-speed automation or heavy-load industrial systems, NTN delivers precision-engineered solutions that enhance efficiency and reliability.

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Part Number d D B r Mass
EC-6304LLBC3
20.000 mm
52.000 mm
15.000 mm
1.100 mm
EC-6306LLB
30.000 mm
72.000 mm
19.000 mm
1.100 mm
EC-6304LLU
20.000 mm
52.000 mm
15.000 mm
1.100 mm
EC-6306LLBC3
30.000 mm
72.000 mm
19.000 mm
1.100 mm
EC-6304LLUC3
20.000 mm
52.000 mm
15.000 mm
1.100 mm
EC-6306LLU
30.000 mm
72.000 mm
19.000 mm
1.100 mm
EC-6304ZZ
20.000 mm
52.000 mm
15.000 mm
1.100 mm
EC-6306LLUC3
30.000 mm
72.000 mm
19.000 mm
1.100 mm
EC-6304ZZC3
20.000 mm
52.000 mm
15.000 mm
1.100 mm
EC-6305
25.000 mm
62.000 mm
17.000 mm
1.100 mm
0.221 kg
EC-6305C3
25.000 mm
62.000 mm
17.000 mm
1.100 mm
0.221 kg
EC-6305LLB
25.000 mm
62.000 mm
17.000 mm
1.100 mm
0.223 kg
EC-6305LLBC3
25.000 mm
62.000 mm
17.000 mm
1.100 mm
EC-6305LLU
25.000 mm
62.000 mm
17.000 mm
1.100 mm
EC-6305LLUC3
25.000 mm
62.000 mm
17.000 mm
1.100 mm
EC-6305LLUCS28
25.000 mm
62.000 mm
17.000 mm
1.100 mm
EC-6305ZZ
25.000 mm
62.000 mm
17.000 mm
1.100 mm
EC-6305ZZC3
25.000 mm
62.000 mm
17.000 mm
1.100 mm
EC-6302LLBC3
15.000 mm
42.000 mm
13.000 mm
1.000 mm
EC-6304C3
20.000 mm
52.000 mm
15.000 mm
1.100 mm