Single-Row Deep Groove Ball Bearings

**Introduction to NSK’s Single Row Deep Groove Ball Bearings: Precision, Performance, and Reliability**

NSK’s Single Row Deep Groove Ball Bearings represent the pinnacle of precision motion and control technology, engineered to deliver exceptional performance, durability, and efficiency across a wide range of industrial, automotive, and precision equipment applications. As a foundational component in rotating machinery, these bearings are designed to handle radial and axial loads simultaneously, offering smooth operation, low friction, and long service life even under demanding conditions.

### **Technical Features and Design Excellence**
NSK’s Single Row Deep Groove Ball Bearings are characterized by their robust construction and advanced material science. Key features include:
– **High-Precision Grinding:** Manufactured to ultra-tight tolerances, these bearings ensure minimal vibration and noise, making them ideal for high-speed applications.
– **Optimized Raceway Geometry:** The deep groove design allows for effective load distribution, enhancing both radial and axial load capacity.
– **Premium Steel and Lubrication Options:** Utilizing high-grade chromium steel (SUJ2 equivalent) and advanced heat treatment processes, NSK bearings achieve superior hardness and fatigue resistance. Custom lubrication options, including grease, oil, or solid lubricants, further extend service intervals.
– **Sealed and Shielded Variants:** Available with rubber seals (RS, 2RS) or metal shields (ZZ) to protect against contamination while retaining lubrication, improving reliability in harsh environments.

### **Performance Advantages**
NSK’s deep groove ball bearings are engineered to outperform competitors in critical areas:
– **Low Friction & Energy Efficiency:** Precision-ground surfaces and optimized internal geometries reduce torque losses, contributing to energy savings in motors, pumps, and automotive systems.
– **High-Speed Capability:** Advanced cage designs (stamped steel, machined brass, or polymer) minimize centrifugal forces, enabling stable operation at elevated speeds.
– **Extended Service Life:** NSK’s proprietary materials and surface treatments, such as Super-TF coating, enhance wear resistance and corrosion protection, reducing maintenance downtime.

### **Typical Applications**
These bearings are indispensable in industries where precision and reliability are paramount:
– **Industrial Machinery:** Electric motors, gearboxes, conveyors, and machine tool spindles benefit from their high load capacity and smooth rotation.
– **Automotive Systems:** Used in alternators, wheel hubs, and transmission systems, NSK bearings contribute to fuel efficiency and reduced NVH (Noise, Vibration, Harshness).
– **Precision Equipment:** Medical devices, robotics, and semiconductor manufacturing equipment rely on their quiet, vibration-free operation for accuracy.

With decades of expertise in bearing technology, NSK continues to innovate, ensuring that its Single Row Deep Groove Ball Bearings meet the evolving demands of modern engineering—delivering unmatched performance, reliability, and efficiency across global industries.

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Designations Nominal Dimensions Basic Load Ratings Speeds
Limiting Speeds
d
mm
D
mm
B
mm
r(min.)
mm
Cr
N
C0r
N
Grease
min-1
Oil (Oil-bath)
min-1
6908DDU
40
62
12
0.6
15000
10000
6300
6908N
40
62
12
0.6
15000
10000
11000
13000
6908NR
40
62
12
0.6
15000
10000
11000
13000
6908VV
40
62
12
0.6
15000
10000
11000
6908ZZ
40
62
12
0.6
15000
10000
11000
16008
40
68
9
0.3
13900
9650
10000
12000
6008
40
68
15
1
18400
11500
12000
14000
6008DDU
40
68
15
1
18400
11500
6000
6008N
40
68
15
1
18400
11500
12000
14000
6008NR
40
68
15
1
18400
11500
12000
14000
6008VV
40
68
15
1
18400
11500
12000
6008ZZ
40
68
15
1
18400
11500
12000
6208DDU
40
80
18
1.1
32000
17900
5600
6208N
40
80
18
1.1
32000
17900
9500
12000
6208NR
40
80
18
1.1
32000
17900
9500
12000
6208VV
40
80
18
1.1
32000
17900
9500
6208ZZ
40
80
18
1.1
32000
17900
9500
6308
40
90
23
1.5
45000
24000
9000
11000
6308DDU
40
90
23
1.5
45000
24000
5300
6308N
40
90
23
1.5
45000
24000
9000
11000
6306N
30
72
19
1.1
29300
15000
11000
13000
6306NR
30
72
19
1.1
29300
15000
11000
13000
6306VV
30
72
19
1.1
29300
15000
11000
6306ZZ
30
72
19
1.1
29300
15000
11000