In single row cylindrical roller bearings, roller is always in a monolithic guard guidance. With monolithic guard ring bearings and cylindrical roller and cage components can be detached from another race. That make it easy to install and remove, especially the two bearing rings are in load requirement to take under the circumstance of interference fit. Single row cylindrical roller bearings can withstand radial load and high speed. These bearings made in several different structure, the main difference is the structure of the guard. The most commonly used is the NU, NJ, NUP and N structure.
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