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
FL695
5.000 mm
13.000 mm
4.000 mm
0.200 mm
W684AX50Z
4.000 mm
9.000 mm
4.000 mm
0.150 mm
W694Z
4.000 mm
11.000 mm
4.000 mm
0.150 mm
WBC4-10Z
4.000 mm
10.000 mm
4.000 mm
0.150 mm
WBC4-8Z
4.000 mm
8.000 mm
3.000 mm
0.080 mm
R155
3.967 mm
7.938 mm
2.779 mm
0.080 mm
624
4.000 mm
13.000 mm
5.000 mm
0.200 mm
0.003 kg
634
4.000 mm
16.000 mm
5.000 mm
0.300 mm
0.005 kg
694
4.000 mm
11.000 mm
4.000 mm
0.150 mm
0.002 kg
BC4-10
4.000 mm
10.000 mm
3.000 mm
0.150 mm
0.001 kg
604
4.000 mm
12.000 mm
4.000 mm
0.200 mm
674A
4.000 mm
7.000 mm
2.000 mm
0.080 mm
684AX50
4.000 mm
9.000 mm
2.500 mm
0.150 mm
BC4-8
4.000 mm
8.000 mm
2.000 mm
0.080 mm
FL694Z
4.000 mm
11.000 mm
4.000 mm
0.150 mm
2.000 kg
FL604Z
4.000 mm
12.000 mm
4.000 mm
0.200 mm
2.300 kg
FL624Z
4.000 mm
13.000 mm
5.000 mm
0.200 mm
3.500 kg
FLAWBC4-10Z
4.000 mm
10.000 mm
4.000 mm
0.150 mm
1.100 kg
FLW684AX50Z
4.000 mm
9.000 mm
4.000 mm
0.150 mm
1.000 kg
FLWBC4-8Z
4.000 mm
8.000 mm
3.000 mm
0.080 mm
0.460 kg
RA155ZZA
3.967 mm
7.938 mm
3.175 mm
0.080 mm
FLR155
3.967 mm
7.938 mm
2.779 mm
0.080 mm
FL604
4.000 mm
12.000 mm
4.000 mm
0.200 mm
FL624
4.000 mm
13.000 mm
5.000 mm
0.200 mm