AC Bearings

**NTN Ball Bearings: Precision Engineered for Performance and Reliability**

NTN Corporation is a globally recognized leader in the design and manufacturing of high-performance rolling bearings, including their renowned **Deep Groove Ball Bearings** and specialized **AC Bearings**. Engineered to deliver exceptional durability, precision, and efficiency, NTN’s ball bearings are trusted across industries—from industrial machinery and automotive systems to precision medical and aerospace equipment.

### **Technical Features & Design Excellence**
NTN’s **Deep Groove Ball Bearings** are designed with a versatile single-row construction, featuring deep raceway grooves that accommodate both radial and axial loads. These bearings are available in open, shielded, or sealed configurations to suit different lubrication and contamination protection needs. Key design elements include:
– **High-Grade Materials**: Manufactured from premium chromium steel or specialty alloys for enhanced wear resistance and fatigue life.
– **Precision Grinding**: Ultra-fine finishing of raceways and balls ensures smooth operation with minimal vibration, critical for high-speed applications.
– **Optimized Internal Geometry**: Advanced curvature and clearance control reduce friction and heat generation, improving energy efficiency.

For demanding applications, NTN’s **AC Bearings** (Angular Contact Ball Bearings) feature a contact angle design that supports combined radial and thrust loads. These bearings are ideal for high-speed operations, with options for single or double-row configurations and matched sets for preload adjustment.

### **Performance Advantages**
NTN bearings excel in performance due to rigorous quality standards and innovative engineering:
– **Extended Service Life**: Superior heat treatment and material purity minimize micropitting and spalling, even under heavy loads.
– **Low Noise & Vibration**: Precision tolerances (ABEC-3 to ABEC-7) make NTN bearings suitable for sensitive applications like electric vehicle motors or CNC spindles.
– **Sealing Solutions**: Integrated seals (LLU, LLB) or shields (ZZ, 2RS) protect against dust and moisture while retaining grease.
– **High-Speed Capability**: Dynamic balancing and advanced cage designs (steel, brass, or polymer) allow stable operation at extreme RPMs.

### **Typical Applications**
NTN’s Deep Groove and AC Bearings are integral to:
– **Automotive Systems**: Wheel hubs, transmissions, alternators, and EV traction motors.
– **Industrial Machinery**: Pumps, compressors, conveyor systems, and robotics.
– **Precision Equipment**: Medical devices, semiconductor manufacturing tools, and aerospace actuators.

Whether for heavy-duty industrial use or high-precision motion control, NTN’s ball bearings combine cutting-edge technology with reliability, ensuring optimal performance in the most challenging environments. Backed by decades of innovation, NTN continues to set benchmarks in bearing technology, delivering solutions that enhance efficiency and reduce total cost of ownership.

For applications demanding uncompromising quality, NTN’s Deep Groove and AC Bearings represent the pinnacle of engineering excellence.

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Part Number d D B r Mass
AC-6309ZZ
45.000 mm
100.000 mm
25.000 mm
1.500 mm
0.810 kg
AC-6309ZZC3
45.000 mm
100.000 mm
25.000 mm
1.500 mm
0.809 kg
AC-6313X4LLUCM
65.000 mm
140.000 mm
33.000 mm
2.100 mm
2.020 kg
AC-TMB204LLB
20.000 mm
47.000 mm
14.000 mm
1.000 mm
0.104 kg
AC-6308ZZ
40.000 mm
90.000 mm
23.000 mm
1.500 mm
0.624 kg
AC-6308ZZC3
40.000 mm
90.000 mm
23.000 mm
1.500 mm
0.624 kg
AC-6309
45.000 mm
100.000 mm
25.000 mm
1.500 mm
0.786 kg
AC-6309C3
45.000 mm
100.000 mm
25.000 mm
1.500 mm
0.786 kg
AC-6309LLB
45.000 mm
100.000 mm
25.000 mm
1.500 mm
0.810 kg
AC-6309LLBC3
45.000 mm
100.000 mm
25.000 mm
1.500 mm
0.810 kg
AC-6309LLU
45.000 mm
100.000 mm
25.000 mm
1.500 mm
0.810 kg
AC-6309LLUC3
45.000 mm
100.000 mm
25.000 mm
1.500 mm
0.810 kg
AC-6307ZZ
35.000 mm
80.000 mm
21.000 mm
1.500 mm
0.446 kg
AC-6307ZZC3
35.000 mm
80.000 mm
21.000 mm
1.500 mm
0.447 kg
AC-6308
40.000 mm
90.000 mm
23.000 mm
1.500 mm
0.609 kg
AC-6308C3
40.000 mm
90.000 mm
23.000 mm
1.500 mm
0.609 kg
AC-6306LLB
30.000 mm
72.000 mm
19.000 mm
1.100 mm
0.334 kg
AC-6308LLB
40.000 mm
90.000 mm
23.000 mm
1.500 mm
0.625 kg
AC-6306LLBC3
30.000 mm
72.000 mm
19.000 mm
1.100 mm
0.334 kg
AC-6308LLBC3
40.000 mm
90.000 mm
23.000 mm
1.500 mm
0.625 kg