1 and when the assembly on external force, not through the bearing of the roller or ball relay to avoid damage bearing.
2, priority of non way of impact loading and unloading.
3, need when knock, way to correct.
4, asking for transmission precision bearings, such as the spindle bearing, and often preloaded force requirements. Because these bearing only in reasonable prestressing force, can achieve the precision of the nominal. For example, lathe spindle, general, before and after two is thrust roller bearing to the heart. After the assembly, need at both ends by nut preloaded, in order to achieve the requirements of the spindle beating.
General pre-tightening force bearing the parameters is provided. But in actual assembly process, not can very good measure to pre-tightening force is in accordance with the requirements, traditionally is often the assembly workers with experience installation.
Some structure, can use the prestressing deformation measurement in advance of the method. For example, a heart to thrust bearing, preloaded force for 20 kg. We can put the bearing outer ring next, frame on the platform, and then in the inner force on 20 kg. Before and after the internal and external force measurement ring height difference of change, usually by centigrade meter leverage can detect. Get deformation, in the tight structure design a gaskets, gaskets of height difference is just preload the variation of before and after. So, ensure nut tight died, preloaded quantity remain unchanged. Change in the past by workers of the strength of the hand assembly method and bearing assembly
4, if there were scrap iron and bearing burr, dust and foreign body in, will make bearing in operation noise and vibration, and even will damage the groove and rolling body. So, in the installation of bearings front, you must ensure that the mounting surface and installation environment clean.
6, bearing before installation must be cleaned it bearing is coated with temporary, you must use clean gasoline or kerosene careful cleaning, besmear again clean quality or high speed high temperature to lubricate the grease can install and use. Cleanness to bearing life and the influence of the vibration noise is very big. But we would like to remind you is: fully enclosed bearing need not cleaning refueling.
7, how to choose a grease lubrication for bearing operation and life has an important influence. Here to you briefly introduced the selection of general principles of grease. By base oil, grease thickening agent and additive.it, different species and the same kinds different type of grease performances are very different, allow rotation limit different, when the choice must pay attention. The performance of the grease mainly by base oil decision. General low viscosity base oil is suitable for low temperature, high speed; High viscosity suitable for high temperature, high load. Thickener also relates to the lubrication performance, thickener water resistance decided to grease water resistance. In principle, the sign of the different grease can not be mixed with, and even the same thickener grease of, because different additive has a bad influence on each other.
In the lubricating bearings, oil coating the more the better you lubrication bearing, oil coating the more the better, this is a common mistake concept. Bearing and bearing indoor much oil will cause excessive oil mix, which generate a high temperature.
8, how to install and remove the installation don't direct hammer the bearing surface and the stress face, should be with press block, sleeve or other installation tools make bearing force uniform. If the installation surface besmear lubricating oil, will make install more smooth. Such as interference with larger, the bearing should be put in mineral oil heating to 90-100 in ℃ immediately after installation. When removing the encounter difficulties, suggest you use to remove the tools of pulling out to both the inner circle of caution on JiaoSa hot oil, heat will make bearing inner circle inflation, making it easier to fall off.
9, bearing radial clearance smaller may be more beautiful? No, all the bearing require minimum work clearance, you must choose the right according to the condition of the clearance. GB4604-93, rolling bearing radial clearance is divided into five groups-two groups, 0 group, the three groups, 4 group, five groups, clearance in value from small to big, with zero group for the standard clearance. Basic radial clearance group applicable to the general operation conditions, conventional temperature and the commonly used over surplus cooperation; In high temperature, high speed, low noise, low friction under special conditions such as work is appropriate chooses the bearing of radial clearance; For precise spindle, machine tool bearing in smaller and appropriate chooses the radial clearance; For roller bearings can keep a small amount of work clearance. In addition, for the bearing is no separation type clearance; Finally, bearing installed after the work clearance, than before the installation of the original clearance small, because bearing to withstand the load rotation, and bearing cooperate and load the effects of elastic deformation.
The rolling bearing clearance adjustment and pre-tightening technology, is to improve the bearing rotation precision and carrying capacity, reduce the transmission system vibration and noise of the effective means. Assembly work should be make clear the concept, clear bearing assembly requirements, and also give consideration to the temperature control and keep the bearing good lubrication, to this process method is applied to correct to ensure the quality of the rolling bearing assembly.
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