How to install INA composite bearing to ensure the quality requirements

The stand or fall of INA bearings to install it or not, will influence the combination of precision, bearing life and performance. Therefore, please fully study the installation of the bearings that carried out in accordance with the operating standards including the following items, please bearing installation. Shaft and hole assembly there such as bruising, burr, rust stain on the surface or solid particles ( Such as abrasive dust, sand, clay) Such as existence, not only can make the bearing installation difficulties and make the installation position is not correct, and solid particles such as falling into a bearing inner grinding effect, when INA bearing rotating grinding or bruising combination bearing surface of the work, so must be carefully checked before the installation, if found to have the above defects, should be revised. For example using oil file to remove burrs, bump touch mark, rusty spot, with fine abrasive cloth lighting, and like a clean solid particles, dirt, etc. Note with sealed bearing do not clean with this law, sealed internal cleaning should remain the same. First, the size of the strict precision demands of rolling bearing steel dimension precision is higher, this is because most of the composite bearing parts, it takes pressure molding. In order to save raw materials and improve labor productivity, the vast majority of bearing ring forging forming, steel ball is through cold heading or hot forming, small size of the roller is also through the cold heading forming. If the size of the steel precision is not high, will not be able to accurately calculate the expected size and weight, which can guarantee the bearing parts of the product quality, also easy to cause the damage of the manufacturing equipment. Second, special strictly purity requirements of the purity of steel is refers to the amount of impurity content in the steel, the higher the purity, the less the non-metallic inclusions in steel. Of the bearing steel bearing the content of harmful impurities such as oxides, silicates and early fatigue spalling, reduced combination bearing life has a lot to do. Brittle most harmful impurities, in particular, because in the process of peeling off easily from the metal substrate, the serious influence bearing after finishing the appearance quality. Should be assembled with clean the surface of the gasoline, kerosene, toluene and xylene solution washing clean, with dry clean duster cloth, and then coated with a thin layer of lubricating oil, it can make the operation more convenient installation. Before the combination bearing installation, should use the appropriate measuring tools according to the provisions of the technical requirements on the design drawing check the shaft and hole and machining quality of parts ( Such as dimensional accuracy and shape accuracy and surface roughness, etc. ) 。 When cleaning a lot of INA bearings, with the first temperature is 90 ~ 100 ℃ heat oil pour hot to melt encapsulated oil, and there is no edge and does not use net exfoliation tools to dig all the old oil, then pour hot a few minutes, then rinse with kerosene oil, clean with gasoline last again. After washing clean, the bearing on film gloves should be worn in the workbench of dry clean cloth or paper. When installed in the open the bearing assembly, put it into the liquids such as gasoline with handle gently gently turning, to ensure the cage, encapsulated oil on the surface of the rolling element and raceway thoroughly washed clean. INA bearings mainly bear axial load in the assembly, its wide application. Although combination bearing installation operation is simple, but it is still common errors occur when maintenance, tight ring of the bearing and loose ring installation position is not correct, the results lose bearing, shaft neck quickly wear. Tight ring of inner ring and shaft neck as transition fit, when the shaft rotates driven tight ring, and end face friction with stationary parts, under the axial force ( 外汇) , there will be friction torque is greater than the inner diameter with resistance moment, locking ring and shaft mating surface forced rotation, intensifying journal wear.