Categories and characteristics of Dalian cylindrical roller bearings

Cylindrical roller bearing is a precision bearing, which is composed of cage, roller and guide shaft ring and can be separated from another bearing ring. It is a separable bearing. This kind of bearing is easy to install and disassemble. Compared with other types of bearings with the same overall dimensions, cylindrical roller bearing has the characteristics of high load, low noise and high speed, and the friction between the rolling element and the collar edge is small, which is suitable for high-speed rotation.

Cylindrical roller bearings, like other types of bearings, are also divided into different categories. How to select the type has once become a relatively common question for our engineers. In order to let you know more about cylindrical roller bearings, Xiaoxiang will take UBC bearings as an example to explain the categories and characteristics of cylindrical roller bearings in detail.

In single-row cylindrical roller bearings, the rollers are usually guided by the retaining edge of a certain ring of a set of bearings. The retaining edge is combined with the roller end with special design and surface treatment to provide improved lubrication, reduce friction and thus reduce the operating temperature of the bearing.

Single-row cylindrical roller bearing can bear heavy radial load and high speed. These bearings are manufactured in several different designs, the main difference is the structure of the rib. NU, NJ, NUP and N designs are commonly used.

Type N - the outer ring has no rib and the inner ring has no rib, which allows the displacement of the shaft in two axial directions relative to the bearing seat. Therefore, these bearings are used as non-fixed end bearings

NU type - the outer ring has double ribs, the inner ring has no ribs, and the rest is the same as above.

NJ type - double rib on the outer ring and single rib on the inner ring. Therefore, these bearings are suitable for axial positioning of the shaft in one direction.

NF type - single rib on the outer ring, double rib on the inner ring, others are the same as above.

NUP type - double retaining edge of outer ring, single retaining edge of inner ring and separable flat retaining ring. These bearings can be used as locating end bearings to provide axial positioning of the shaft in both directions.

NFP type - outer ring single retaining edge and separable flat retaining ring, inner ring single retaining edge, the rest are the same as above.