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Internal and external factors affecting the service life of double row cylindrical roller bearings

wallpapers News 2020-11-17

Generally, the space for installing double row cylindrical roller bearings is limited. In most cases, the shaft diameter (or bearing inner diameter) is based on mechanical design or other design constraints. Therefore, the choice of bearing type and size depends on the inner diameter of the bearing. Therefore, the main size table of standard bearings is compiled according to the international standard inner diameter size.


Standard double row cylindrical roller bearings come in various sizes, and standard bearings are used in the design of mechanical equipment (this design determines whether the bearings are easy to buy. What I want to say is that, in addition, certain bearing catalogs There are indeed models in China, but some are not applicable. There are no standard bearings in mainland China, and sometimes futures will take a long time. Therefore, when choosing a bearing, you must consider the time cost and the cost of later replacement. Rolling bearings, the load applied to the bearing, its nature, The size and direction are variable. Usually, the rated basic load is shown on the size table. However, the axial load and radial load are also important factors in choosing a suitable bearing.

Bearing speed

The allowable speed is determined by factors such as the type, size, accuracy, cage type, load, lubrication method, and cooling method of the double row cylindrical roller bearing. The bearing table lists the allowable speed of standard precision bearings under oil lubrication and grease lubrication. Generally, deep groove ball bearings, self-aligning ball bearings and cylindrical roller bearings are suitable for high-speed operation.

Bearing tolerance

The dimensional accuracy and rotation accuracy of double row cylindrical roller bearings are based on ISO and JIS standards. For machines that require high precision and high-speed operation, it is recommended to use bearings of grade 5 or higher. Deep groove ball bearings, radial thrust ball bearings or cylindrical roller bearings are suitable for machines with higher running accuracy. Rigidity, elastic deformation occurs when the contact surface of the rolling elements of the bearing and the raceway is compressed. Some machines need to minimize elastic deformation. The elastic deformation of rolling bearings is smaller than that of ball bearings.


ERIC BEARING LIMITED provides high-quality bearings and engineering products from the world\'s leading manufacturers. As Asia\'s leading bearing distributor, we enjoy a high reputation among customers. If you have any questions or comments about bearings, you are welcome to contact us for free, and we will reply to you within two hours.