Single-Row Cylindrical Roller Bearings

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

In the demanding world of industrial machinery, automotive systems, and precision equipment, the reliability and efficiency of rotating components are critical. NSK’s **Single Row Cylindrical Roller Bearings** stand at the forefront of precision motion and control technology, offering unmatched performance in high-load, high-speed applications. Engineered with advanced materials, precision manufacturing, and innovative design features, these bearings deliver exceptional durability, reduced friction, and extended service life—ensuring optimal performance in even the most challenging environments.

### **Technical Features & Design Advantages**
NSK’s Single Row Cylindrical Roller Bearings are designed with a robust construction that maximizes load capacity while minimizing operational friction. Key features include:

– **High Radial Load Capacity:** The optimized roller and raceway geometry ensures even stress distribution, making these bearings ideal for heavy radial loads encountered in industrial gearboxes, machine tools, and powertrain systems.
– **Precision Ground Components:** Manufactured to ultra-tight tolerances, NSK’s bearings minimize vibration and noise, enhancing performance in precision applications such as robotics, medical equipment, and semiconductor manufacturing.
– **Superior Lubrication Retention:** Advanced cage designs and surface treatments improve lubricant distribution, reducing wear and extending maintenance intervals.
– **Heat-Resistant Materials:** High-grade steel and specialized heat treatments enhance durability, even in high-temperature environments like automotive transmissions or steel mill equipment.
– **Low Friction & Energy Efficiency:** Optimized internal geometry reduces power loss, contributing to energy savings in electric motors, wind turbines, and industrial automation systems.

### **Performance Advantages**
NSK’s Single Row Cylindrical Roller Bearings outperform conventional solutions by offering:
– **Longer Service Life:** Reduced wear and fatigue resistance ensure extended operational life, lowering total cost of ownership.
– **Enhanced Rigidity & Stability:** Precision alignment and optimized internal clearances improve machine accuracy, critical for CNC machining and robotics.
– **Versatility in Mounting:** Available in various configurations (e.g., NU, NJ, NUP designs), these bearings accommodate different shaft fixation requirements, simplifying integration into diverse machinery.

### **Typical Applications**
These bearings are widely used in industries where precision, reliability, and high load capacity are essential:
– **Industrial Machinery:** Gearboxes, pumps, compressors, and printing presses.
– **Automotive Systems:** Transmissions, wheel hubs, and electric vehicle drivetrains.
– **Precision Equipment:** Robotics, medical imaging devices, and aerospace actuators.

By combining cutting-edge engineering with rigorous quality control, NSK’s Single Row Cylindrical Roller Bearings provide a dependable solution for applications demanding precision motion control, durability, and efficiency. Whether in high-speed production lines or mission-critical automotive systems, NSK ensures smooth, reliable performance—keeping industries moving forward.

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Designations Nominal Dimensions Basic Load Ratings
d
mm
D
mm
B
mm
r(min.)
mm
r1(min.)
mm
FW
mm
EW
mm
Cr
N
C0r
N
N321M
105
225
49
3
3
195
420000
390000
N321W
105
225
49
3
3
195
420000
390000
NF321M
105
225
49
3
3
195
420000
390000
NF321W
105
225
49
3
3
195
420000
390000
NJ321EM
105
225
49
3
3
133
525000
480000
NU321EM
105
225
49
3
3
133
525000
480000
NUP321EM
105
225
49
3
3
133
525000
480000
N1022
110
170
28
2
1.1
155
161000
174000
NF1022
110
170
28
2
1.1
155
161000
174000
NJ1022
110
170
28
2
1.1
125
161000
174000
NU1022
110
170
28
2
1.1
125
161000
174000
N222M
110
200
38
2.1
2.1
178.5
295000
290000
N222W
110
200
38
2.1
2.1
178.5
281000
272000
NF222M
110
200
38
2.1
2.1
178.5
295000
290000
NF222W
110
200
38
2.1
2.1
178.5
281000
272000
NJ222EM
110
200
38
2.1
2.1
132.5
360000
365000
NJ222ET
110
200
38
2.1
2.1
132.5
360000
365000
NUP2319ET
95
200
67
3
3
121.5
565000
585000
NUP2319ET7
95
200
67
3
3
121.5
565000
585000
N1020
100
150
24
1.5
1.1
137
114000
126000
NJ1020
100
150
24
1.5
1.1
113
114000
126000
NU1020
100
150
24
1.5
1.1
113
114000
126000
NUP1020
100
150
24
1.5
1.1
113
114000
126000
N220M
100
180
34
2.1
2.1
160
225000
217000