Installation should pay attention to matters

1. When installation is not allowed on the bearing hole, groove, chamfering, and facing. Otherwise, easy to cause deformation of bearing ring, affecting the service life of bearings and precision, and cutting off the metal is easy to enter the bearing surface of the work, accelerate the raceway and rolling element wear and tear, causing premature failure. 2. When installation are not allowed to directly with hammer knock bearing ring. Bearing reference face the anniversary itself close to shoulder installation. Bearing reference face is according to the bearing face any type to distinguish, deep groove ball bearings, self-aligning ball bearings, cylindrical roller bearing, spherical roller bearings and needle roller bearings, with no words face as the datum; Angular contact ball bearings and tapered roller bearings, in order to have a word face as the datum. 3. Pressure when installation should be added on the ring width of interference fit with installation, is installed on the shaft, the pressure should be added on the bearing inner ring end face; Load bearing hole, pressure should be added on the bearing outer ring end face. Don't allow through the rolling element and maintain delivery pressure. 4. For inner ring for tight fit, the bearing outer ring for slide fit, when installation, the integral type should be the first bearing on the shaft loaded, then shaft together with the bearing load bearing shell hole; Department of separable type, inner and outer ring can be installed separately. 5. Installed to prevent bearing, shaft and bearing hole centerline must coincide. Such as the installation is not straight, need to reinstall, must through the inner ring end face, pull the bearing. 1. Bearing inspection after installation bearing installed correctly or not, has direct influence on the life and precision of host. If improperly installed, bearing not only have a vibration, noise, low accuracy, increasing temperature, but also be jammed the danger of burn out; Conversely, install well, can not only guarantee the accuracy, life will be greatly extended. Therefore, the bearings after installation, inspection must be conducted. Key inspection items are as follows: 1. Inspection installation location bearings after installation, the first test whether running parts and fixed parts touching one another, lubricating oil can flow to flow into the bearing, seal device and axial fastening device installed correctly. 2. Inspection radial clearance, besides preloaded bearing installed with radial clearance shall be checked. Deep groove ball bearings available hand rotation test, in order to smooth and flexible, no vibration, no swinging as well. Cylindrical roller bearing and spherical roller can examine feeler, feeler will be inserted between the roller and bearing ring, feeler insertion depth should be more than half the length of the roller. When the bearing radial clearance cannot be measured with a feeler, measurable bearing in axial travelmotion, instead of the decrease of the radial clearance. Under normal circumstances, such as bearing inner ring for the cone hole, in axial movement on the surface of the cone is radial clearance to reduce the quantity of about 15 times. Bearing radial clearance, some unqualified can be adjusted after installation, such as the angular contact ball bearings, tapered roller bearings; Some are in manufacturing has been adjusted according to the prescribed standards and unqualified can no longer after installation and adjustment, such as deep groove ball bearings, self-aligning ball bearings, cylindrical roller bearing, spherical roller bearing, etc. If this type of bearing is installed by the inspection is unqualified, radial assembly clearance is too small, the improper selection of bearing with or assembled parts processing is not correct. At this point, the bearing must be unloaded, find out the reason, to be eliminated. Of course not bearing clearance is too large. 3. Test of a bearing and shaft shoulder by tight under normal circumstances, the tight fit interference installation of the bearings must rely on the shoulder. Test method: 1) Lighting method. The lights on the bearing and shaft shoulders, see light-leaking judging. If not light-leaking, installed correctly; If uniform around the shoulder light-leaking, bearing with shoulder to rely on tight, deal with bearing put pressure on tight; If some light-leaking, bearing installation tilt, available hit bearing inner ring hammer, tongbang, or socket, trued slowly. ( 2) Thickness gauge test. The thickness of the thickness gauge shall be 0. 3 mm. Test, the bearing inner ring end face and shoulder the entire circumference try several, and if found to have clearance is very uniform, bearing is not installed in place, inflating a bearing inner ring to make it on the shoulder; If increase the pressure also is not tight, journal fillet area of rounded corners is too large, the bearing stuck, should trim journal fillet, make its become smaller; If it is found that bearing inner ring end face and bearing shoulder parts thickness gauge can pass, not at this time must be removed, to nap, reinstall. If bearing for interference fit is mounted on the bearing hole, bearing outer ring is fixed, shell hole block shoulder its outer end face and the shell hole blocking shoulder face is on tight, installation is correct, also can examine thickness gauge. 4. When installing thrust bearing thrust bearing test after the installation, should check shaft and shaft centerline of verticality. Method is to fix the dial gauge box shell end face, make the table touch the top of the head of the ring raceway on bearing axle bearing, and observe the dial gauge pointer, if the pointer deflection, axial circle and not vertical shaft centerline. Box shell hole deep, also can use extended dial gauge head test. Thrust bearing installed correctly, the seat can automatically adapt to roller rolling, to ensure that the rolling elements located at the top and bottom ring raceway. If installed backwards, bearing not only don't work properly, and the matching surface will badly worn. Due to axial ring and seat and the difference is not obvious, the assembly should be extra careful, do not make a mistake. In addition, the seat of thrust bearing and the bearing holes should also be left between 0. 2 - 0. 5 mm clearance to compensate parts processing, installation error caused by inaccurate, when the bearing ring during operation center offset, the clearance can be adjusted to ensure the automatic, the avoidance of friction, make its normal operation. Otherwise, will cause bearing severe damage. Test run, inspection of bearing noise, temperature rise, vibration is in line with the requirements. General bearing working temperature should be lower than 90 ℃, the temperature is too high, will result in bearing heat annealing or loss, reduce the service life.