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2019.10.31 11:34

한국국적귀화시험반

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다울빛이주여성연합회 
 
한국 국적귀화시험반 
 
오늘  2명이 빠졌네요..ㅠㅠ 
 
그래도 항상 열심히  하는 3명은 절때 빠지지 않는다~


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    Bella 2021.03.24 17:27
    Click here to buy FAG 1226 bearing. Eric Bearing LTD has enough stock for it.

    Rolling bearing precision components require corresponding caution when used. Not only does it change the use of high-performance linear bearings, but if they are not used properly, they cannot achieve the expected performance test results, so the following aspects of bearings are considered:
    1. Keep the bearing and its surroundings clean. Even invisible dust bearing smiles will increase Timken bearing wear, vibration and noise.
    2. When using installation, do not allow strong punching carefully, do not allow the use of hammer bearings, allow direct hit by rolling pressure.
    3. Use appropriate and accurate installation tools, the use of special tools, try to avoid the use of fabrics and staple fibers.
    4. To prevent the corrosion of NSK bearings, directly select the bearings by hand, fully wash the sweat on your hands, and apply high-quality mineral oil before starting, especially in the rainy season and summer, pay attention to rust.
    After the bearing is installed in the host, there is a measurement index called cyclic rotation accuracy. This kind of change approximately repeats that the required number of revolutions represents the "quasi-period" of the cyclic rotation accuracy, and the magnitude of the magnitude change within the quasi-cycle is large, that is, the cyclic rotation accuracy is poor.
    When proper preload is applied to the bearing spindle, this can gradually increase the speed to close to the working speed to implement the "run-in" effect of the linear bearing, which can improve the cycle rotation accuracy of the spindle.
    There is a precision instrument that improves the accuracy of NSK bearings. When the main shaft uses 6202/P2 type bearings, but its accuracy still can not meet the requirements, then thicken the journal and make a raceway on it to replace the inner ring, and the steel ball is accurately measured, and the size is set every three pieces , Each group of steel balls is separated by an interval of close to 120°, due to the reduction of a heavy processing surface and a reduction of a matching surface, and at the same time, the rigidity of the shaft-bearing system is improved, and the maximum three balls are close to the minimum three balls The equidistant distribution also improves the rotation accuracy of the shaft, thus meeting the accuracy requirements of the instrument.

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