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Double Row Cylindrical Roller Bearing
Double Row Cylindrical Roller Bearing

Double Row Cylindrical Roller Bearing

The rollers of two-row cylindrical roller bearings are crossing arranged. While rotating, the wave ratio is one time higher than single-row cylindrical roller bearings. However, the vibration ratio decreases 70%. And due to its two-row roller arrangement, compared with single-row cylindrical roller bearings, they are able to bear extremely higher load capacity. 


Applications of Bearing

Based on the different bore types, ZZ’s double-row cylindrical roller bearings are divided into two types, one is with cylindrical bore and the other is with a tapered bore. Based on a different arrangement of flanges on the inner ring and outer ring, and also the cage design,  ZZ’s double-row cylindrical roller bearings are divided into NNU, NN, and NNUP types. For NNU type, there are ribs on both sides of the outer ring but no ribs on the inner ring. For NN type, there are ribs on both sides of the inner ring but no ribs on the outer ring. For NNUP type, there ribs on both sides of the outer ring, and ribs on one inner ring. While mounting the NNUP types, do make the marked ribs outward. In general, NU and NN type are used on the free end and NUP types on fixed end. 


ZZ offers double row cylindrical roller bearing both with machined brass and steel cages. With continuous efforts in improving on the quality, ZZ has helped the customers realized the following goals by providing two-row cylindrical roller bearings:


  • Reduce the cost 

  • Increase productivity 

  • Prolong the equipment service life 

  • Improve the sustainability  



The features of two-row cylindrical roller bearings are as follows

  • Compact internal structure 

  • Higher stiffness

  • Higher load capacity ability 

  • Small deformation after high load 

  • Lower friction 

  • Longer service life 

  • Improve the operational reliability 

  • Separable and interchangeable 

  • High-speed ability 

  • Application of two-row cylindrical roller bearings are as follows:

  • The spindle of tooling machine, rolling mills, gearboxes, grinding machines and so on.


ZZ Bearing Recommendations
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Cleaning, Installation and Disassembly of Roller Bearings
A roller bearing is an assembly that supports the rotation of a shaft. Its ferrule and the roller are precision machined. Anti-rust oil or antirust grease is injected between the raceway and the rolli...