Cylindrical roller bearings

Single Row Cylindrical Roller Bearings has high radial load capacity, good impact resistance, and rigidity. They typically support short shafts that elongate due to heat and cause axial displacement and machine accessories that require separable bearings.

Specific characteristics of single-row cylindrical roller bearings

• Single-row cylindrical roller bearings are only subject to radial forces. The radial load-bearing capacity is increased by 1.5-3 times compared with ball bearings of the same size, and they have good rigidity and impact resistance.

• The cylindrical rollers are in line contact with the raceway surface, have large radial load-bearing capacity, and are suitable for bearing heavy and impact loads.

• The structure is easy to achieve high-precision processing, the friction coefficient is small, and it is suitable for high speeds. The limit speeds are close to that of deep groove ball bearings.

• N-type and NU-type allow the shaft to move axially within a certain range relative to the housing, so they are most suitable for free-end bearings.

• NJ type and NF type can bear a certain degree of unidirectional axial load, and NUP type can bear a certain degree of bidirectional axial load.

• The shaft or seat hole processing requirements are relatively high. After the bearings are installed, the relative deflection of the outer ring axis must be rigidly controlled to avoid contact stress concentration.

Structure type of single-row cylindrical roller bearing

Single-row cylindrical roller bearings usually can be divided into N type, NU type, NJ type, NUP type, and NF type according to whether there are ribs. The schematic diagram is as follows.

Single-row cylindrical roller bearings can also be designed as sealed and split types. Sealed bearings protect the rollers from pollutants, water, and dust. They can prevent lubricant loss and contamination of the external environment by the internal lubricant, thereby making the sealed bearings have good lubrication performance and extending the service life of the bearings. Split single-row cylindrical roller bearings are mainly used in inaccessible bearing arrangements, such as crankshafts. Such split bearings are easy to repair and replace.

Naming rules for single-row cylindrical roller bearings

The naming rules of single-row cylindrical roller bearings are as follows:

Application of single-row cylindrical roller bearings

Single-row cylindrical roller bearings are mainly used in large and medium-sized electric motors, rolling stock, machine tool spindles, internal combustion engines, generators, gas turbines, reduction gearboxes, rolling mills, vibrating screens, and lifting and transportation machinery.

Technical parameters of single-row cylindrical roller bearings