Double Row NNU Precision Crossed Cylindrical Roller Bearing SX011824

Precision Cylindrical Roller Bearings

The rollers of  cylindrical roller bearings are key components. Their geometry, the so-called logarithmic profile, provides an optimum stress distribution in the contact zones in the bearing. Their surface finish maximizes lubricant film formation and optimizes rolling motion of the rollers. The benefits derived from this compared with traditional designs include enhanced operational reliability and a greater insensitivity to misalignment.

cylindrical roller bearings have many designs, dimension series and sizes. The majority is single row bearings with a cage. Single and double row full complement bearings (without cage) complete the standard assortment for general engineering. Bearings with a cage can accommodate heavy radial loads and operate at high speeds. Full complement cylindrical roller bearings are suitable for very heavy radial loads at moderate speeds.


The range of  cylindrical roller bearings comprises the basic types

single row cylindrical roller bearings, caged, mainly of the NU, NJ, NUP and N designs.

double row cylindrical roller bearings, caged, mainly of the NNUand NN designs.

single row full complement cylindrical roller bearings, mainly of the NCF and NJG designs.

double row full complement cylindrical roller bearings, mainly of the NNF design.

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