Bearings and shaft or bearing bore interference is small, multi-use push method assembly. The easiest way is to use copper and hand hammer, according to a certain order to beat the bearings with symmetrical interference fit of the seat ring, pressed into the bearing smoothly. Alternatively, use a soft metal hammer into the casing by hand or pressed into the press. If improper operation, will cause the seat deformation cracking, or hand hammered in a non-interference fit on the seat, then make KOYO bearing raceways and body indentation or indirect bearing is damaged.

     KOYO bearings in the assembly, if the interference with the shaft of a larger assembly generally use hot charging method. Coming into bearing oil drums filled with oil, machine oil drums outside with hot water or flame heating, heating oil temperature control process requirements at 80 ℃ ~ 90 ℃, generally not more than 100 ℃, up to no more than 120 ℃. Bearing Kit quickly removed after heating in the journal. If improper temperature control heating temperature is too high, then make the bearings caused tempering hardness decreased, running bearing on easy to wear, spalling, and even cracking.

     From the above, whether to adjust the gap or clearance is adjustable KOYO bearings, they must be adjusted in the assembly axial clearance (gap not adjustable, but some do not leave the bearing axial clearance) to the compensation axis at elevated temperatures The thermal elongation, thus ensuring the normal operation of KOYO bearing body. If the axial clearance is too small, will cause the bearing rotation difficulties, fever, and even the KOYO bearing body stuck or damaged; if the axial clearance is too large, it will lead to operation produces a different sound, and even cause severe vibrations or the retainer destruction.

     Improper alignment couplings

     Most operating device input shaft is connected to the power shaft coupling and therefore must be the coupling assembly alignment, the driving shaft and the driven shaft on the same axis.

     (1) KOYO bearings poor lubrication oil (or grease) has a certain temperature, when the temperature is too high, it will deteriorate, and thus lose lubrication, the bearing due to high temperature burning. In addition, the oil (or grease) poor texture itself or run refueling (fat) is not timely, can also cause the bearing temperature rise or generate different sound.

     (2) rotor imbalance Generally, equipment operation should be carried out prior to assembly rotor dynamic and static balance, therefore, the bearing is not going to have problems. However, some rotor during operation due to corrosive media or solid impurities wear or bending of the shaft occurs, it will result in unbalanced centrifugal force, so that the bearing heat, vibration, roller severe wear, until destruction.

     (3) check and replace the bearing during operation is not timely, regular inspections required, if there is fever, abnormal sound, vibration, etc., to find reasons to stop in time, eliminate the fault, bearings, such as found in severe fatigue spalling, oxidation corrosion, wear and tear pits, cracks, hardness decreased to HRC <60, or any excessive noise can not be adjusted, it should be replaced. If the inspection, replacement is not timely, it will cause serious damage to the rotor bearing even, thus affecting the normal production. In addition, the bearing removal improper equipment anchor bolts loosening caused by vibration, will lead KOYO bearing raceways and rolling elements indentation, bearing inner and outer race of cracking.

     The method of eliminating faults

     (1) replacement of bearings, to carefully examine the new bearings, while the shaft and bearing bore and the rotor careful examination;

     (2) assembly and disassembly of the bearing, the strict implementation of the maintenance process, serious operation, to avoid bearing damage due to improper assembly and disassembly;

     (3) time and fuel oil, ensure the bearing working conditions is always in good condition;

     (4) the operation carefully checked and found hidden faults, timely elimination.