Angular contact ball bearing the effects of surface roughness for installation

By heating TIMKEN bearing or bearing seat, by using thermal expansion will fit into a loose fit installation method. Installation method is a kind of common and energy saving. This method is suitable for interference quantity larger the installation of angular contact ball bearing, the bearing before hot charging type or separable bearing ring into the fuel tank 80 - uniform heat 100 ℃, and then loaded on the shaft, as soon as possible out of the oil to prevent inner ring after cooling end face and shoulder joint is not tight, bearing axial fastening again after cooling. Bearing outer ring and light metal bearing seat tight fit, by heating the hot charging method of the bearing, can avoid the mating surface scratch. Heating tank with bearing and should be at a certain distance from the bottom of a mesh, or hanging hooks in the bearings, bearing on the bottom, in case of heavy impurities into the bearing or uneven heating, fuel tank must have a thermometer, strictly control the oil temperature shall not exceed 100 ℃, in order to prevent the tempering effect, reduce the hardness of the ring. 1. Lathe bearing rigidity deficiencies such as drag board and iron is loose, and drive imbalance caused by vibration. Lathe TIMEKN bearing installation is solid, of course, also can cause vibration, due to the vibration caused by the workpiece surface roughness decrease. 2. Bearing stiffness caused vibration so as far as possible choose coarse tool rod, reduce angular contact ball bearing extended length; Insufficient rigidity can also cause vibration of workpiece, so to apply when turning slender shaft center frame, or use a clip to replace the two top clamping. 3. Bearing geometric parameters of cutting part is not correct according to the workpiece material selection can be cutting characteristics of reasonable and appropriate cutting Angle, lower surface roughness. 4. Due to devolop tumor, lower the surface roughness of the devolop tumor is very strong, due to the participation of the devolop tumor when cutting, make the bearing surface, the phenomenon of the hair or a road cross the trench, turning Angle contact ball bearing should try to avoid its produce. Combined with the analysis of the causes, process should be early know in early prevention, the problem in the bud, increase TIMKEN bearing the workpiece precision, meet the design requirements. The life of rolling bearing with revolution ( Or in the hours of work under a certain speed) , definition: within the life of the bearing, should be in any of its bearing ring or rolling on initial fatigue damage ( Flake or defect) 。 Whatever the test in the laboratory or in actual use, can be clearly seen, under the same working conditions the appearance of the same angular contact ball bearings, real life was very different. And there are several different definitions of bearing 'life', one of which is known as the 'service life', it said before damage to the real life of a bearing is the wear and tear, damage usually is not caused by fatigue, but due to abrasion, corrosion, damage to the seal, and so on. Most of the bearing damage for many reasons - — Than previously estimated load, the effective sealing, tight fit too small, as a result of bearing clearance, etc. Any of these factors factors there is its special damage forms and will leave a special signs of deterioration. Examine the damage to the bearings in most cases, therefore, can discover the possible causes, generally speaking, a third of the angular contact ball bearing damage resulting from the fatigue damage, a third of the other resulting from poor lubrication, a third of the other resulting from pollutants into the TIMKEN bearing improper handling or installation.