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
6221ZZ
105
190
36
2.1
146000
105000
3800
6321
105
225
49
3
202000
154000
2600
3200
6321DDU
105
225
49
3
202000
154000
2000
6321ZZ
105
225
49
3
202000
154000
2600
6919DDU
95
130
18
1.1
37000
33500
2800
6919N
95
130
18
1.1
37000
33500
4800
5600
6919NR
95
130
18
1.1
37000
33500
4800
5600
6919VV
95
130
18
1.1
37000
33500
4800
6919ZZ
95
130
18
1.1
37000
33500
4800
16019
95
145
16
1
47000
42000
4500
5300
6019
95
145
24
1.5
66500
54000
5300
6000
6019DDU
95
145
24
1.5
66500
54000
2600
6019N
95
145
24
1.5
66500
54000
5300
6000
6019NR
95
145
24
1.5
66500
54000
5300
6000
6019VV
95
145
24
1.5
66500
54000
5300
6019ZZ
95
145
24
1.5
66500
54000
5300
6219
95
170
32
2.1
120000
82000
4300
5000
6219DDU
95
170
32
2.1
120000
82000
2600
6219N
95
170
32
2.1
120000
82000
4300
5000
6219NR
95
170
32
2.1
120000
82000
4300
5000
6219VV
95
170
32
2.1
120000
82000
4300
6219ZZ
95
170
32
2.1
120000
82000
4300
6319
95
200
45
3
168000
119000
3400
4300
6319DDU
95
200
45
3
168000
119000
2400