The rolling bearing has a specified clearance according to the contract when it is manufactured.This clearance is generally called the original clearance; when the FAG bearing is installed on the host, due to an interference fit of a certain ring, the bearing clearance value decreases Small, the clearance formed after installation is called the installation clearance; after operation, the temperature of the bearing parts increases, the volume changes, and the elongation phenomenon also occurs due to the increase in the temperature of the shaft or shell that matches the bearing. This causes the bearing clearance to change again. This working clearance is called the working clearance. The working clearance is generally smaller than the installation clearance, and sometimes this clearance value will also increase with different configurations and installation methods.
First of all, while structural design and advanced, there will be a longer FAG bearing life. Bearing manufacturing will undergo multiple operations including forging, heat treatment, turning, grinding and assembly. The rationality, advancedness and stability of the treatment will also affect the service life of the bearing. The heat treatment and grinding processes that affect the bearing are often more directly related to the quality of the product related to the failure of the bearing. In recent years, the study of the deterioration of the surface layer of bearings shows that the grinding process is closely related to the quality of the bearing surface.
The influence of metallurgical quality of FAG bearing materials is the main factor for early failure of rolling bearings. With the progress of metallurgical technology (such as bearing steel, vacuum degassing, etc.), the quality of raw materials has been improved. The proportion of raw material quality factors in the analysis of bearing failure has decreased significantly, but it is still one of the main factors of bearing failure. Whether the selection is appropriate is still a bearing failure analysis that must be considered.
The main task of FAG bearing failure analysis is to find out the main factors that cause bearing failure based on a large amount of background materials, data and failure mode analysis. In order to make targeted improvements, extend the service period of the bearing to avoid unexpected events of the bearing Early failure. FAG bearings 234408 M.SP online , if you need , pls contact with us .
High-speed precision bearings are mainly used in light-loaded high-speed rotation occasions, which require high-precision bearings, high speed, low temperature rise and low vibration and a certain service life. The support parts of high-speed electric spindles, which are often used in pairs, are installed in pairs and are the key matching parts for high-speed electric spindles of internal surface grinding machines.
The service life of high-speed precision bearings has a great relationship with installation, and the following matters should be noted
1. Bearing installation should be carried out in a dust-free and clean room. The bearings must be carefully selected. The bearing spacers must be ground. The parallelism of the spacers should be controlled at 1um under the premise of keeping the inner and outer ring spacers equal. the following;
2. The bearing should be cleaned before installation. When cleaning, the inner ring slopes upwards, the hand feels flexible and there is no stagnation. After drying, put the specified amount of grease. If it is oil mist lubrication, a small amount of oil mist oil should be placed;
3. Special tools should be used for bearing installation, the force is even, and knocking is strictly prohibited;
4. FAG bearing storage should be clean and ventilated, no corrosive gas, relative humidity should not exceed 65%, long-term storage should be regularly rust-proof.
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