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Wear on the plastic slide bearings

Release date:2015-07-30views:6258

Plastic plain bearings Plastic plain bearings wear depends on the wear resistance of the material itself, but wear the following factors are also closely related to plastic plain bearings: The grinding shaft material, hardness, roughness, bearing running speed, load and ambient temperature , humidity and so on; as a manufacturer of plastic sliding bearings, it is constantly optimized wear plastic bearing material and to provide users with the correct selection of guidance; and as the user to follow the plastic sliding bearings manufacturer Product Manual for plastic plain bearing selection and assembly instructions.

The most critical moment any bearing is the startup phase. In this case, the lubricating film is not formed and the bearing to work, this is the most common case. As long as a work in load bearing, bearing it will have slight wear. In the start-up phase, when the fine wear more fully, it will use the outer surface of these tiny wear particles filling the shaft, and therefore low wear work can produce optimal lubricating film. After starting, minor wear decreased rapidly, these changes have little effect on the size. After continuous start-up phase, the wear rate is small and stable.

Any type of plastic plain bearings have mated for the best working conditions, such as the best fit of the shaft material, roughness; optimum working pressure, speed, temperature and the like; for CSB-EP series of plastic sliding bearings Best with the shaft material is plated with hard chrome surface; roughness on the CSB plastic plain bearings for shaft roughness of each model is different, we can see from Figure 3 CSB plastic plain bearings for shaft roughness from Ra0. 1 to Ra1.6; while the CSB-EP5 plastic plain bearings for optimum temperature is not at room temperature, EP5 manifested at a temperature of 160 ℃ friction and wear properties of the best.

CSB Research laboratory test constantly imitate working conditions found in the form of the occurrence of plastic sliding bearings wear at work are the following:

Normal wear - wear bearing occurs under the right conditions with; wear mainly the result of the work this time bearing the initial stage bearing the lubricating substance to the surface of the shaft, while the transfer, when the ideal of the establishment of a sub-bearing lubrication the wear rate is slowly reduced.

Crawling wear - since the shaft surface roughness caused by friction surface is too smooth crawling; shaft surface is too smooth, plastic plain bearings in the lubricating substance can not be transferred to the lubricating film is filled pits formed in the surface of the shaft so that friction can not be established ideal; this bearing friction coefficient increases, also increases the driving force required;

Plowing wear - too rough result since the shaft friction surface scratching furrows phenomenon; shaft surface height difference is too large, the transfer from the bearing surface to form a solid lubricating substances can not ideal smooth surface friction; wear occurs at this time of the essence is abrasion and scratch resistance;

Wear glued - glued bearing safety reasons beyond the operating temperature or optical axis caused; axis adsorption wear has occurred in local softening of friction bearing surface formed at the bearing operating temperature exceeds the permissible safe operating temperature.

Burns wear - running too fast due to the friction surface wear and tear caused by burns; cause shaft bearings run faster than the allowed speed due to friction when friction heat generated from a sharp rise in friction surface, a sharp rise in the frictional heat of friction surface burns fast.

Of course, the plastic slide bearing wear occurs is unavoidable phenomenon, in the case of the plastic slide bearing performance has been established, we can use as much as possible to follow the rules for each of the different types of bearings, plastic bearing wear to a minimum, thereby The plastic bearing play to the best performance.