The NN3020 Double Row Cylindrical Roller Bearing is a high-capacity precision bearing designed for applications requiring extremely high radial load capacity and excellent rigidity. Its double-row structure significantly increases load performance while maintaining stable operation under heavy-duty conditions.
Unlike single-row bearings, the NN type features a non-locating design that allows axial displacement, making it ideal for systems where thermal expansion must be accommodated. This ensures smooth operation and reduced internal stress during continuous industrial use.
Manufactured from high-quality chrome steel and available in stainless steel or special material options, the NN3020 bearing delivers long service life, low friction, and high reliability in demanding environments such as steel production, mining, and heavy machinery.
Key Features
- Double row cylindrical roller design for ultra-high radial load capacity
- High rigidity and stable performance under heavy loads
- Non-locating structure allows axial displacement
- Low friction and smooth operation
- Suitable for high-speed and heavy-duty applications
- Excellent durability and long service life
- Optional stainless steel and custom material versions
Technical Specifications
| Parameter | Value |
|---|---|
| Bearing Model | NN3020 |
| Inner Diameter (d) | 100 mm |
| Outer Diameter (D) | 150 mm |
| Width (B) | 37 mm |
| Bearing Type | Double Row Cylindrical Roller Bearing (NN Type) |
| Material | Chrome Steel / Stainless Steel |
| Cage Material | Steel / Brass |
| Lubrication | Grease / Oil |
| Precision Rating | P0 / P6 / P5 |
| Operating Temperature | -20°C to 120°C |
Applications
The NN3020 double row cylindrical roller bearing is widely used in:
- Steel rolling mills
- Heavy-duty industrial gearboxes
- Mining machinery
- Construction equipment
- Large electric motors
- Paper and textile machinery
- Industrial transmission systems
Why Choose Us
- Strong capability in heavy-duty bearing manufacturing
- OEM and custom engineering support available
- Advanced production and heat treatment technology
- Strict quality inspection and testing system
- Fast global delivery and stable supply
FAQ
Q1: What is the advantage of double row cylindrical roller bearings?
A: They provide significantly higher radial load capacity and improved rigidity compared to single-row designs.
Q2: What is the difference between NN and NNU types?
A: NN type allows axial displacement of the shaft, while NNU type allows axial displacement of the housing.
Q3: Can NN3020 be used in heavy industrial applications?
A: Yes, it is specifically designed for heavy-load environments such as steel mills and mining equipment.
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