Single Row Radial Ball Bearings

**NTN Single Row Deep Groove Ball Bearings: Precision, Durability & Performance for Demanding Applications**

NTN’s **Single Row Deep Groove Ball Bearings** represent the pinnacle of reliability and efficiency in radial bearing technology. Designed to handle both radial and moderate axial loads, these bearings are engineered for high-speed operation, low noise, and extended service life across a wide range of industrial and automotive applications. With precision-ground raceways, high-quality steel construction, and advanced sealing options, NTN’s deep groove ball bearings deliver unmatched performance in compact, lightweight designs.

### **Technical Features & Design Advantages**
NTN’s deep groove ball bearings incorporate several key innovations to optimize performance:
– **Robust Single-Row Design**: The deep, uninterrupted raceway geometry ensures smooth load distribution, reducing stress concentrations and wear.
– **High-Grade Materials**: Manufactured from premium chromium steel (SUJ2 equivalent) or specialty alloys, these bearings resist fatigue and deformation under heavy loads.
– **Precision Grinding & Tolerances**: NTN’s stringent manufacturing standards ensure ABEC-1 to ABEC-7 tolerance classes, minimizing vibration for sensitive applications.
– **Versatile Configurations**: Available with shields (ZZ, 2Z), rubber seals (LLU, 2LU), or open designs to suit lubrication and contamination control needs.
– **Optimized Cage Designs**: Options include pressed steel, machined brass, or polymer cages (e.g., glass fiber-reinforced PA66) for high-speed stability.

### **Performance Benefits**
– **Low Friction & Energy Efficiency**: Reduced torque losses enhance efficiency in motors, pumps, and electric vehicles (EVs).
– **High-Speed Capability**: Advanced lubrication and dynamic balancing enable stable operation at extreme RPMs (e.g., machine tool spindles).
– **Long Service Life**: NTN’s proprietary heat treatment and surface finishing technologies (like TF treatment) combat micropitting and extend bearing life.
– **Quiet Operation**: Precision engineering minimizes acoustic noise, ideal for HVAC fans and automotive alternators.

### **Typical Applications**
NTN’s deep groove ball bearings are integral to:
– **Industrial Machinery**: Electric motors, gearboxes, conveyors, and CNC equipment.
– **Automotive Systems**: Wheel hubs, transmissions, alternators, and EV drivetrains.
– **Precision Equipment**: Medical devices, robotics, and aerospace actuators.
– **Consumer Appliances**: Compressors, power tools, and agricultural machinery.

For engineers seeking a balance of load capacity, speed, and reliability, NTN’s deep groove ball bearings offer a proven solution backed by global R&D and stringent quality control. Whether in harsh industrial environments or high-performance automotive systems, these bearings ensure smooth, maintenance-free operation under demanding conditions.

*Explore NTN’s full range of sizes, seals, and specialty coatings to match your application’s exact requirements.*

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Part Number d D B r Mass
W605Z
5.000 mm
14.000 mm
5.000 mm
0.200 mm
625Z
5.000 mm
16.000 mm
5.000 mm
0.300 mm
0.005 kg
W625Z
5.000 mm
16.000 mm
5.000 mm
0.300 mm
635Z
5.000 mm
19.000 mm
6.000 mm
0.300 mm
0.008 kg
WA675Z
5.000 mm
8.000 mm
2.500 mm
0.080 mm
624ZZ
4.000 mm
13.000 mm
5.000 mm
0.200 mm
0.003 kg
634ZZ
4.000 mm
16.000 mm
5.000 mm
0.300 mm
0.005 kg
624ZZC3
4.000 mm
13.000 mm
5.000 mm
0.200 mm
0.003 kg
634ZZC3
4.000 mm
16.000 mm
5.000 mm
0.300 mm
604ZZ
4.000 mm
12.000 mm
4.000 mm
0.200 mm
0.002 kg
694ZZ
4.000 mm
11.000 mm
4.000 mm
0.150 mm
0.002 kg
W684AX50ZZ
4.000 mm
9.000 mm
4.000 mm
0.150 mm
WBC4-10ZZ
4.000 mm
10.000 mm
4.000 mm
0.150 mm
WBC4-8ZZ
4.000 mm
8.000 mm
3.000 mm
0.080 mm
634LLU
4.000 mm
16.000 mm
5.000 mm
0.300 mm
FLW674ASA
4.000 mm
7.000 mm
2.500 mm
0.080 mm
0.350 kg
WBC4-8ZZPS5
4.000 mm
8.000 mm
3.000 mm
0.080 mm
FLR156
4.762 mm
7.938 mm
2.779 mm
0.080 mm
FLR166
4.762 mm
9.525 mm
3.175 mm
0.080 mm
FLRA3
4.762 mm
12.700 mm
4.978 mm
0.300 mm
FL605
5.000 mm
14.000 mm
5.000 mm
0.200 mm
FL625
5.000 mm
16.000 mm
5.000 mm
0.300 mm
FL675
5.000 mm
8.000 mm
2.000 mm
0.080 mm
FL685
5.000 mm
11.000 mm
3.000 mm
0.150 mm