Roller Bearing selection and alternative steps

Select the methods and steps: No correct selection of roller bearings, the host can get a good performance, extend service life; on enterprises can reduce maintenance time, reduce maintenance costs, improve the operation rate of the machine, all have an important role. Therefore, both design and manufacturing units, or units of service used, the choice of rolling bearings must attach great importance when, all of their options program shown in Figure 1 1.
In general, the choice of bearing steps may be summarized as:

a. According to bearing operating conditions (including the load direction and load type, speed, lubrication method, concentricity requirements, positioning or location, installation and maintenance of environment, environmental temperature, etc.), choose the basic types of bearings, tolerance levels and clearance;

b. According to the bearing and forces the working conditions and life requirements, determined by calculating the bearing type, or according to application requirements, selection of bearing type, and then checking life;

c. Checking the selected bearing loads and rated speed limit.

Select bearing the major considerations is the limit speed requirements Dacron life and load capacity, other factors will help to determine the bearing type, structure, size and tolerance level and clearance requirements of the final work plan.

Various types of rolling bearings have different properties, applicable to the use of a variety of different machines. Select bearing type,

Usually the following factors should be considered. General situation: on the bearing thrust bearing thrust loads used, angular contact bearings, high-speed applications typically use ball bearings to withstand heavy radial loads, then use roller bearings. In short, use staff from different manufacturers, many bearing products, choose the appropriate type.

Share of machinery bearing the space and location, in the mechanical design, the general first determine the shaft size, and then, depending on the shaft bearing sizes. Axis is usually chosen small ball bearings, roller bearings, shaft selection. However, when the diameter of bearing in the machine direction is limited, then use needle roller bearings, special light and ultra-light series of ball or roller bearings; when the bearing axial position in the machine is limited, they can choose narrow or special narrow range of ball or roller bearings.

Bearing suffered load, the direction and nature of the bearing load is the most important selection factor. Roller bearings for heavy load bearing, ball bearings for light or medium load bearing, or bainite hardening carburizing steel bearings can withstand shock and vibration loads.
 

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