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
NN3026
130
200
52
2
182
350000
475000
3000
3600
NN3034
170
260
67
2.1
236
555000
805000
2200
2600
NN3026K
130
200
52
2
182
350000
475000
3000
3600
NN3034K
170
260
67
2.1
236
555000
805000
2200
2600
NNU4928
140
190
50
1.5
350000
585000
2800
3600
NNU4936K
180
250
69
2
590000
1020000
2200
2600
NNU4928K
140
190
50
1.5
350000
585000
2800
3600
NN3036
180
280
74
2.1
255
695000
995000
2000
2400
NN3028
140
210
53
2
192
365000
515000
2800
3400
NN3036K
180
280
74
2.1
255
695000
995000
2000
2400
NN3028K
140
210
53
2
192
365000
515000
2800
3400
NNU4938
190
260
69
2
595000
1060000
2000
2600
NNU4930
150
210
60
2
435000
715000
2600
3200
NNU4938K
190
260
69
2
595000
1060000
2000
2600
NNU4930K
150
210
60
2
435000
715000
2600
3200
NN3038
190
290
75
2.1
265
730000
1080000
2000
2400
NN3022
110
170
45
2
155
281000
375000
3400
4300
NN3030
150
225
56
2.1
206
410000
585000
2600
3000
NN3038K
190
290
75
2.1
265
730000
1080000
2000
2400
NN3022K
110
170
45
2
155
281000
375000
3400
4300