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
FL674A
4.000 mm
7.000 mm
2.000 mm
0.080 mm
FL684AX50
4.000 mm
9.000 mm
2.500 mm
0.150 mm
FL694
4.000 mm
11.000 mm
4.000 mm
0.150 mm
FLBC4-10
4.000 mm
10.000 mm
3.000 mm
0.150 mm
FLBC4-8
4.000 mm
8.000 mm
2.000 mm
0.080 mm
FLRA155ZZA
3.967 mm
7.938 mm
3.175 mm
0.080 mm
FLAWBC4-10ZZ
4.000 mm
10.000 mm
4.000 mm
0.150 mm
FL604ZZ
4.000 mm
12.000 mm
4.000 mm
0.200 mm
FL624ZZ
4.000 mm
13.000 mm
5.000 mm
0.200 mm
FLW674ASSA
4.000 mm
7.000 mm
2.500 mm
0.080 mm
FLW684AX50ZZ
4.000 mm
9.000 mm
4.000 mm
0.150 mm
FL694ZZ
4.000 mm
11.000 mm
4.000 mm
0.150 mm
FLWBC4-8ZZ
4.000 mm
8.000 mm
3.000 mm
0.080 mm
RA155ZA
3.967 mm
7.938 mm
3.175 mm
0.080 mm
634Z
4.000 mm
16.000 mm
5.000 mm
0.300 mm
0.005 kg
W604Z
4.000 mm
12.000 mm
4.000 mm
0.200 mm
W624Z
4.000 mm
13.000 mm
5.000 mm
0.200 mm
FLRA2-6ZZA
3.175 mm
9.525 mm
3.571 mm
0.130 mm
FLRA2ZZA
3.175 mm
9.525 mm
3.967 mm
0.300 mm
RA144ZA
3.175 mm
6.350 mm
2.779 mm
0.080 mm
RA2-5Z
3.175 mm
7.938 mm
3.571 mm
0.080 mm
RA2-6ZA
3.175 mm
9.525 mm
3.571 mm
0.130 mm
RA2Z
3.175 mm
12.700 mm
4.366 mm
0.300 mm
RA2ZA
3.175 mm
9.525 mm
3.967 mm
0.300 mm