Technology is a useful partner for the installation of the bearing, the slightest mistake, is likely to result in irreversible loss of today, therefore we must come prepared to learn about before the bearings are mounted and the installation process should be noted in the area.
1, the installation surface and the installation site requirements
If bearings are iron, burrs, dust and other foreign bodies from entering into, will generate noise and vibration when the bearing in operation, can damage the raceways and rolling elements. Therefore, before installing the bearings, you must make sure that the mounting surface and clean installation environment.
2, bearings before mounting must be cleaned
Bearing surfaces coated with antirust oil, you need to carefully clean with clean petrol or kerosene, and then coated with a clean high quality or high speed and high temperature lubricant grease before installation. Influence of cleanliness on the service life of the bearing and vibration and noise is very large. But we wish to remind you of is: sealed bearings do not need cleaning and refueling.
3, grease selection
Lubrication for operation and service life of the bearings have an extremely important effect, here to brief you choose general principle of grease. Grease is made of base oils, thickeners and additives, different types and a description of different grades of lubricating grease performance varied widely, allowing rotation limit of different, when you choose it is important to note. Grease performance mainly decided by the base oil, low viscosity base oil suitable for low temperature, high speed, high viscosity suitable for high temperature, high-load. Bearing lubrication performance thickening agent, thickening agent for water resistance determines the resistance of lubricating grease to water. In principle, different brands of lubricant cannot be mixed, and, even if it is the same the grease thickener, also will bring bad effects due to different additives.
4, oil added
Lubricate bearings, grease, the more the better, this is a common misconception. Bearings and bearing Interior too much grease will cause the excessive mixing of oils, which results in extremely high temperatures. Filling quantity of lubricant to the bearing with the bearing Interior 1/2~1/3, high speed should be reduced to one-third.
5, bearing installation and removal
When installing not to direct hammering and non-bearing end bearing surface, should be to block, sleeve or other installation tools the bearing uniform force, not by rolling power installation. If the mounting surface coated with a lubricant will make installation more smooth. Interference combined with larger bearings placed in mineral oil should be heated to 80~90℃ as soon as possible after installation, strict control of oil temperature of not more than 100 ° c, to prevent the effect of tempering hardness reducing the impact and recovery. Removal is difficult, it is recommended that you use the removal tool to pull the inner ring at the same time carefully perfuse hot oil, heat the bearing inner ring expansion, making it more prone to shedding.
6, selection of bearing radial clearance
Not all bearing requires a minimum operational clearance, condition, you must choose the appropriate clearance. GB 4604-93, rolling bearing radial clearance is divided into five groups-groups of 2, 0 groups, 3 groups, 4 groups, 5 groups, clearance value in turn from small to large, 0 group for a standard clearance. Basic radial tour gap group applies Yu General of running conditions, and General temperature and the common of had Ying tie; in high temperature, and high-speed, and low noise, and low mill wiped, special conditions Xia work of bearing is should be selection large of radial tour gap; on precision spindle, and machine spindle with bearing, should be selection smaller of radial tour gap; for roll child bearing can maintained small of work tour gap. In addition, doesn't matter for isolation bearing clearance and, finally, bearing capacity of work clearance, to be smaller than the original clearance before installation, because the bearings are subjected to a certain amount of load rotation, as well as bearing and the elastic deformation of the load.



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