Matching and application method of bearing

2021-09-09 11:50:23 By Admin

The bearing is known as the grain of industrial machinery, which is related to the operation and efficiency of the machine. In addition to its own quality problems, the most important thing to determine the service life of the bearing is the matching selection and use method of the bearing. Next, Nanjing youpai Bearing Co., Ltd. will explain the matching and use method of the bearing.


1、 Matching selection


The inner diameter and outer diameter of rolling bearings are manufactured according to standard tolerances. The fit tightness of bearing inner ring and shaft, outer ring and seat hole can only be realized by controlling the tolerance of journal and seat hole. The matching between the bearing inner ring and the shaft adopts the base hole system, and the matching between the bearing outer ring and the seat hole adopts the base shaft system.


To correctly select the fit, we must know the actual load conditions, working temperature and other requirements of the bearing, which is actually very difficult. Therefore, in most cases, the matching is selected according to the use of fine grinding. The basis for selecting the matching nature of the bearing is: the type of load on the inner and outer rings of the bearing, the size of the load on the bearing, the working conditions of the bearing, the materials and loading and unloading requirements of the holes and shafts matched with the bearing, etc.


2、 Load size


Bearing load is the maximum load that the bearing can bear, including radial and axial. The win-win amount between the ferrule and the shaft or shell depends on the load. The heavier load adopts the larger win-win amount, and the lighter load adopts the smaller win-win amount.


Rated static load is one of the most important technical characteristics of rolling bearing. Together with rated dynamic load, it constitutes two basic aspects of rolling bearing load performance. Rated static load represents the ability of bearing to resist permanent deformation, and rated dynamic load represents the ability of bearing to resist fatigue failure.


3、 Precautions for use


Rolling bearing is a precision part, so it is required to be cautious in use. Even if high-performance bearing is used, if it is not used properly, it can not achieve the expected performance effect. Therefore, pay attention to the following matters when using bearings:


  1. Keep the bearings and their surroundings clean. Even if very small dust enters the bearing, it will aggravate the wear, vibration and noise of the bearing.


  1. To prevent the corrosion and rust of the bearing, it is better not to hold the bearing directly by hand, but to apply high-quality mineral oil before operation. Pay special attention to rust prevention in rainy season and summer.


  1. The installation shall be careful. It is not allowed to press strongly, directly knock the bearing, and transfer pressure through the rolling element.


  1. Use correct installation tools, use special tools as much as possible, and try to avoid using cloth and short fiber.