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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 but vibration ratio decrease 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, ZWA’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,  ZWA’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. 


ZWA offers double row cylindrical roller bearing both with machined brass and steel cages. With continuous efforts in improving on the quality, ZWA 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.


ZWA Bearing Recommendations
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​ZWA attend 2021 April China Bearing and Power Transmission Online Expo
ZWA attend 2021 April China Bearing and Power Transmission Online Expo, booth A004. Live broadcast time 3 pm to 4 pm (local time) on April 14th.