Maintenance of Rolling Bearing Accuracy
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| Time：2016.11.15 News Sources：Shandong Xinkaite bearing Co.,Ltd. Views：
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Rolling bearings should be cleaned with gasoline or kerosene before use, dry and use, and ensure good lubrication, rolling bearings are generally greased, can also be used oil lubrication. The use of grease lubrication, should be used without impurities, anti-oxidation, rust, extreme pressure and other properties of superior grease. Grease filled with rolling bearings and rolling bearing box volume of 30% -60%, not too much. Rolling bearings with sealed structure have been filled with grease, the user can directly use, can not be cleaned.
Rolling bearing installation, the rolling bearing surface in the ring must be imposed on the circumference of equal pressure, the ring pressed into, not with a hammer and other tools directly percussion rolling bearing end, so as not to damage the rolling bearing. In the case of a smaller amount of interference, can be used at room temperature with a sleeve pressure roller bearing ring face, with the head knocking sleeve, through the sleeve will be pressed into the ring evenly. If the installation of large quantities can be used hydraulic machine. When pressing in, it shall be ensured that the outer ring end face and the shell shoulder end face, the inner ring face face and the shaft shoulder face face are pressed, and no clearance is allowed.
(1) Measurement of the shaft and the size of the bearing hole to determine the accuracy of the rolling bearing with the requirements are as follows: the inner ring and shaft to take interference fit, interference 0 ~ +4 m (light load, high precision 0) ; But the outer ring and the rolling bearing seat hole to take the gap with the amount of clearance 0 ~ +6 m (but in the free end of the rolling bearing with angular contact ball bearings, but also increase the gap); axis and seat surface roundness error of 2μm below the rolling bearing The bevel of the shoulder of the rolling bearing seat on the axis is less than 4 m; and the inner surface of the front cover of the spindle is less than 4 m. The inner surface of the spindle is inclined to be less than 2 m.
(2) the installation of fixed-end front rolling bearing on the shaft: the rolling bearing with a clean cleaning kerosene for thorough cleaning, for grease lubrication, first containing 3% to 5% of the grease into the organic solvent degreasing cleaning roller bearings, The oil gun will fill the quantitative grease into the rolling bearing (accounting for 10% to 15% of the space volume of the rolling bearing); heating the rolling bearing to raise the temperature by 20 to 30 DEG C; using a hydraulic press to mount the rolling bearing into the shaft end; And with the appropriate pressure against the rolling bearing end to axial positioning; the spring scale of the tape roll in the rolling bearing outer ring, with the measured starting torque method to check the provisions of the preload whether there is a significant change (even if the rolling bearing is correct , But due to the deformation of the mating or cage, preload may also change).
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