Double Row Cylindrical Roller Bearings

The bearings have separable inner and outer rings with cages made of polyamide, steel, or brass, allowing easy installation and maintenance. Available in types such as NNU and NN, these bearings are widely used in applications requiring high accuracy and durability.

Types & Features of Double Row Cylindrical Roller Bearings

NNU Type

• Inner ring with two flanges; outer ring without flanges
• Supports heavy radial loads at high speeds
• High rigidity and precision performance
• Allows axial displacement in both directions
• Separable design for easy mounting

NN Type

• Outer ring with two flanges; inner ring without flanges
• Designed for high-speed and heavy radial load applications
• Provides excellent stiffness and accuracy
• Supports axial displacement in both directions
• Easy installation due to separable components

Additional Design Characteristics

• Some variants have no flanges, allowing free axial movement (floating bearing)
• Bearings with partial flange design can support limited axial loads
• Optimized geometry ensures uniform stress distribution
• Interchangeable components for easy maintenance

Advantages of Double Row Cylindrical Roller Bearings

• Higher radial load capacity due to double row design
• Excellent stiffness and running accuracy
• Reduced noise, vibration, and heat generation
• Suitable for high-speed and heavy-duty applications
• Allows axial displacement in both directions
• Improved lubrication for longer service life
• Compact design for easy installation and maintenance
• Reliable performance with minimal downtime

Applications

• Machine Tools
• Industrial Gearboxes
• Electric Motors
• Rolling Mills
• Pumps & Compressors
• Heavy Industrial Equipment
• Precision Machinery
• Power Generation Systems