Double-Row Cylindrical Roller Bearings

**NSK Super Precision Bearings: Engineered for Unmatched Accuracy and Performance**

In the world of high-precision motion and control, NSK’s **Super Precision Bearings** stand as a benchmark for reliability, rigidity, and ultra-low friction performance. Among these, the **Super Precision Cylindrical Roller Bearings** and **Double Row Cylindrical Roller Bearings** are engineered to meet the most demanding applications—delivering exceptional rotational accuracy, high load capacity, and extended service life in industries where precision is non-negotiable.

### **Technical Excellence and Design Innovations**
NSK’s **Super Precision Cylindrical Roller Bearings** are designed with optimized roller profiles, precision-ground raceways, and advanced materials to minimize vibration, heat generation, and wear. These bearings feature:
– **Ultra-High Precision (P4, P2, or higher grades)** – Ensuring minimal runout and consistent performance in high-speed applications.
– **Enhanced Load Capacity** – Radial load handling is maximized through superior roller-to-raceway contact, making them ideal for heavy-duty machining and automation.
– **Low Friction & High-Speed Capability** – Special cage designs (e.g., brass or polymer cages) reduce friction, allowing for smoother operation at elevated speeds.

For applications requiring even greater rigidity and load distribution, NSK’s **Double Row Cylindrical Roller Bearings** provide:
– **Increased Radial Stiffness** – Two rows of rollers enhance stability, critical for machine tool spindles and high-precision gearboxes.
– **Optimized Internal Geometry** – Precision alignment minimizes deflection under heavy loads, maintaining accuracy in dynamic conditions.
– **Sealed or Open Configurations** – Options for grease lubrication or integrated sealing solutions extend maintenance intervals in harsh environments.

### **Performance Advantages for Critical Applications**
NSK’s super precision cylindrical roller bearings excel in environments where even micron-level deviations can impact performance. Key advantages include:
– **Extended Service Life** – Advanced heat treatment and surface finishing techniques reduce wear, ensuring longevity even under continuous high-load operation.
– **Reduced Noise & Vibration** – Critical for semiconductor manufacturing, medical imaging equipment, and high-end robotics.
– **Thermal Stability** – Engineered to maintain dimensional stability under thermal fluctuations, crucial for CNC machining and aerospace components.

### **Typical Applications Across Industries**
These bearings are indispensable in sectors demanding the highest levels of precision and durability:
– **Industrial Machinery** – Machine tool spindles, robotic arms, and printing presses rely on their rigidity and speed capabilities.
– **Automotive Systems** – High-performance transmissions, electric vehicle (EV) drivetrains, and turbochargers benefit from their low friction and high-load support.
– **Precision Equipment** – Medical imaging devices, optical alignment systems, and semiconductor wafer handling require the near-zero runout provided by NSK’s super precision designs.

By combining cutting-edge engineering with decades of expertise, NSK’s **Super Precision Cylindrical Roller Bearings** and **Double Row Cylindrical Roller Bearings** set the standard for motion control in the most demanding applications—ensuring efficiency, accuracy, and reliability where it matters most.

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Designations Nominal Dimensions Basic Load Ratings Speeds
Limiting Speeds
d
mm
D
mm
B
mm
r(min.)
mm
Cr
kN
C0r
kN
Grease
min-1
Oil (Oil-air)
min-1
NN3020MB
100
150
37
1.5
180
265
6000
7200
NN3922MB
110
150
30
1.1
131
207
5800
7000
NN3020MBKR
100
150
37
1.5
180
265
6000
7200
NN3922MBKR
110
150
30
1.1
131
207
5800
7000
NN3020TB
100
150
37
1.5
180
265
6800
8000
NN4922MB
110
150
40
1.1
192
335
5800
7000
NN3013TBKR
65
100
26
1.1
88.5
116
10400
12200
NN3016MBKR
80
125
34
1.1
137
186
7400
8800
NN3018ZTBKR
90
140
37
1.5
97.5
114
7800
10300
NN3013ZTB
65
100
26
1.1
52.5
58.0
10900
14500
NN3016TB
80
125
34
1.1
137
186
8300
9800
NN3013ZTBKR
65
100
26
1.1
52.5
58.0
10900
14500
NN3016TBKR
80
125
34
1.1
137
186
8300
9800
NN3014MB
70
110
30
1.1
112
148
8000
10000
NN3016ZTB
80
125
34
1.1
81.5
93.0
8800
11700
NN3014MBKR
70
110
30
1.1
112
148
8000
10000
NN3016ZTBKR
80
125
34
1.1
81.5
93.0
8800
11700
NN3014TB
70
110
30
1.1
112
148
9500
11200
NN3017MB
85
130
34
1.1
144
201
7000
8400
NN3014TBKR
70
110
30
1.1
112
148
9500
11200
NN3017MBKR
85
130
34
1.1
144
201
7000
8400
NN3014ZTB
70
110
30
1.1
66.5
74.0
9900
13200
NN3017TB
85
130
34
1.1
144
201
8000
9400
NN3014ZTBKR
70
110
30
1.1
66.5
74.0
9900
13200