Double-Row Cylindrical Roller Bearings

**Introduction to NSK’s Double Row Cylindrical Roller Bearings: Precision, Performance, and Reliability**

In the demanding world of industrial machinery, automotive systems, and precision equipment, the performance and durability of rotating components are critical to operational success. NSK, a global leader in motion and control technologies, offers a superior solution with its **Double Row Cylindrical Roller Bearings**—engineered to deliver unmatched load capacity, rigidity, and precision in even the most challenging applications.

### **Technical Features & Design Excellence**
NSK’s **Double Row Cylindrical Roller Bearings** are designed with advanced engineering to optimize load distribution and minimize friction. Key features include:

– **High Load Capacity:** The double-row arrangement of precision-ground rollers significantly increases radial load capacity compared to single-row designs, making them ideal for heavy-duty applications.
– **Enhanced Rigidity:** A robust cage design ensures proper roller alignment, reducing deflection under high loads and improving system stability.
– **Low Friction & Heat Generation:** Optimized roller profiles and high-quality steel materials minimize energy loss, extending bearing life and reducing maintenance needs.
– **Precision Tolerance:** Manufactured to exacting ISO standards, these bearings provide consistent performance in high-speed and high-precision environments.
– **Versatile Configurations:** Available in various designs, including **NU, NN, and NNU types**, to accommodate different mounting requirements and operational demands.

### **Performance Advantages for Industrial & Automotive Applications**
NSK’s Double Row Cylindrical Roller Bearings excel in applications where reliability and precision are non-negotiable:

– **Industrial Machinery:** Used in machine tools, gearboxes, and rolling mills, these bearings ensure smooth operation under heavy radial loads and high rotational speeds.
– **Automotive Systems:** In transmissions, wheel hubs, and electric vehicle drivetrains, they provide the durability needed for long service life and reduced downtime.
– **Precision Equipment:** Critical in robotics, medical devices, and aerospace systems, where minimal vibration and high positional accuracy are essential.

### **Why Choose NSK?**
With over a century of expertise in bearing technology, NSK combines **advanced materials, precision manufacturing, and rigorous testing** to deliver bearings that outperform industry standards. Whether in extreme temperatures, contaminated environments, or high-speed operations, NSK’s Double Row Cylindrical Roller Bearings provide **longer service life, reduced energy consumption, and enhanced operational efficiency.**

For engineers and designers seeking a reliable, high-performance bearing solution, NSK’s Double Row Cylindrical Roller Bearings represent the ideal balance of **strength, precision, and durability**—ensuring optimal motion control in the most demanding applications.

*Experience the NSK advantage—where innovation meets precision engineering.*

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Designations Nominal Dimensions Basic Load Ratings Speeds
Limiting Speeds
d
mm
D
mm
B
mm
r(min.)
mm
FW
mm
Cr
N
C0r
N
Grease
min-1
Oil (Oil-bath)
min-1
NN3020K
100
150
37
1.5
137
193000
265000
4000
4800
NN3006
30
55
19
1
48.5
38000
37000
12000
14000
NN3014K
70
110
30
1.1
100
120000
148000
5600
6700
NNU4921
105
145
40
1.1
198000
315000
3800
4800
NN3006K
30
55
19
1
48.5
38000
37000
12000
14000
NN3014
70
110
30
1.1
100
120000
148000
5600
6700
NNU4921K
105
145
40
1.1
198000
315000
3800
4800
NN3007
35
62
20
1
55
48500
50000
10000
12000
NN3015
75
115
30
1.1
105
119000
149000
5300
6300
NN3021
105
160
41
2
146
243000
320000
3800
4500
NN3007K
35
62
20
1
55
48500
50000
10000
12000
NN3015K
75
115
30
1.1
105
119000
149000
5300
6300
NN3021K
105
160
41
2
146
243000
320000
3800
4500
NN3008
40
68
21
1
61
53000
55500
9000
11000
NN3016
80
125
34
1.1
113
147000
186000
4800
6000
NNU4922
110
150
40
1.1
205000
335000
3600
4500
NN3008K
40
68
21
1
61
53000
55500
9000
11000
NN3016K
80
125
34
1.1
113
147000
186000
4800
6000
NNU4922K
110
150
40
1.1
205000
335000
3600
4500
NN3009
45
75
23
1
67.5
63500
68500
8500
10000
NN3017
85
130
34
1.1
118
154000
201000
4500
5600
NN3009K
45
75
23
1
67.5
63500
68500
8500
10000
NN3017K
85
130
34
1.1
118
154000
201000
4500
5600
NN3010
50
80
23
1
72.5
65500
72500
7500
9000