Spherical Roller Bearings

**NSK Spherical Roller Bearings: Precision Motion for Demanding Industrial Applications**

In the world of precision motion and control, NSK stands as a leader in delivering high-performance bearing solutions designed to meet the rigorous demands of modern industrial machinery, automotive systems, and precision equipment. Among NSK’s extensive portfolio of roller bearings, **Spherical Roller Bearings** stand out for their exceptional load capacity, self-aligning capability, and durability—making them indispensable in applications where misalignment, heavy loads, and harsh operating conditions are common challenges.

### **Technical Features & Design Excellence**
NSK’s Spherical Roller Bearings are engineered with a robust double-row barrel-shaped roller design, paired with a spherical outer ring raceway. This unique construction allows the bearings to accommodate **both radial and axial loads simultaneously**, while compensating for **shaft misalignment**—a critical advantage in machinery subject to deflection or mounting inaccuracies. Key technical features include:

– **High Load Capacity:** Optimized roller geometry and advanced heat treatment processes ensure superior resistance to dynamic and static loads, extending service life even under extreme stress.
– **Self-Alignment Capability:** The spherical outer ring design permits up to **2-3 degrees of angular misalignment**, reducing stress concentrations and preventing premature failure in applications where shaft deflection or housing distortion occurs.
– **Enhanced Lubrication & Sealing:** NSK incorporates advanced sealing solutions and lubrication technologies to minimize friction, reduce wear, and prevent contamination—critical for bearings operating in dirty or high-temperature environments.
– **Precision-Grade Manufacturing:** Manufactured to tight tolerances using high-quality steel and advanced grinding techniques, NSK Spherical Roller Bearings deliver smooth, vibration-free operation essential for precision equipment.

### **Performance Advantages for Industrial & Automotive Applications**
NSK’s Spherical Roller Bearings excel in applications requiring **high reliability, long service life, and minimal maintenance**. Their ability to handle heavy loads and misalignment makes them ideal for:

– **Industrial Machinery:** Used in gearboxes, conveyors, crushers, and mining equipment where shock loads and misalignment are prevalent.
– **Material Handling & Construction Equipment:** Essential for cranes, excavators, and heavy-duty pulleys where durability under variable loads is critical.
– **Automotive & Transportation:** Applied in truck axles, transmissions, and off-road vehicles that demand robust performance under harsh conditions.
– **Wind Turbines & Energy Systems:** Trusted in renewable energy applications where reliability and minimal downtime are paramount.

### **Conclusion: Engineered for Reliability & Efficiency**
NSK Spherical Roller Bearings represent the pinnacle of precision motion control, combining innovative design with high-performance materials to deliver unmatched reliability in the most demanding environments. Whether in heavy industry, automotive systems, or precision machinery, NSK’s bearings ensure **smooth operation, extended service life, and reduced maintenance costs**—reinforcing NSK’s reputation as a global leader in advanced bearing technology.

For industries that demand **durability, precision, and efficiency**, NSK Spherical Roller Bearings provide the optimal solution to enhance performance and productivity.

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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
23218CE4
90
160
52.4
2
340000
490000
1800
2400
23218CKE4
90
160
52.4
2
340000
490000
1800
2400
21304CDE4
20
52
15
1.1
29300
26900
6300
8200
21304CDKE4
20
52
15
1.1
29300
26900
6300
8200
22205CE4
25
52
18
1
37500
37000
7100
9000
22205CKE4
25
52
18
1
37500
37000
7100
9000
21305CDE4
25
62
17
1.1
43000
40500
5300
6700
21305CDKE4
25
62
17
1.1
43000
40500
5300
6700
22206CE4
30
62
20
1
50000
50000
6000
7500
22206CKE4
30
62
20
1
50000
50000
6000
7500
21306CDE4
30
72
19
1.1
55000
54000
4500
6000
21306CDKE4
30
72
19
1.1
55000
54000
4500
6000
22207CE4
35
72
23
1.1
69000
71000
5300
6700
22207CKE4
35
72
23
1.1
69000
71000
5300
6700
21307CDE4
35
80
21
1.5
71500
76000
4000
5300
21307CDKE4
35
80
21
1.5
71500
76000
4000
5300
22208EAE4
40
80
23
1.1
113000
99500
6700
8500
22208EAKE4
40
80
23
1.1
113000
99500
6700
8500
21308EAE4
40
90
23
1.5
118000
111000
6000
7500
21308EAKE4
40
90
23
1.5
118000
111000
6000
7500
22308EAE4
40
90
33
1.5
170000
153000
5300
6700
22308EAKE4
40
90
33
1.5
170000
153000
5300
6700
22209EAE4
45
85
23
1.1
118000
111000
6000
7500
22209EAKE4
45
85
23
1.1
118000
111000
6000
7500