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Bearing installation and disassembly method

by:JNSN     2021-12-15
Whether the bearing is installed correctly affects the accuracy, life and performance. Therefore, the design and assembly department must fully study the bearing installation. Hope to install in accordance with operating standards. The operating standard items are usually as follows: (1) Whether the bearing is cleaned and the related parts of the bearing are installed correctly, which affects the accuracy, life and performance. Therefore, the design and assembly department for bearing installation (2) check the size and finishing of related parts (3) installation (4) inspection after the bearing is installed (5) supply lubricant; hope to open just before installation Bearing packaging. General grease lubrication, do not clean, directly fill with grease. Lubricating oil is lubricated, and cleaning is not usually necessary. However, the bearings for instruments or high-speed applications should be washed with clean oil to remove the anti-rust agent coated on the bearings. Bearings with anti-rust agent removed are easy to rust, so they should not be left alone. In addition, bearings that have been packed with grease can be used directly without cleaning. The installation method of the bearing varies with the bearing structure, fit, and conditions. Generally, because most of the shaft rotates, the inner ring needs an interference fit. Bearings with cylindrical bores are usually pressed in with a press or hot-fitting methods are often used. In the case of a tapered hole, install it directly on the tapered shaft or install it with a sleeve. When installing to the shell, generally there is a lot of clearance fit, and the outer ring has an interference. It is usually pressed in with a press, or there is also a shrink fit method for installation after cooling. When dry ice is used as the coolant, the moisture in the air will condense on the surface of the bearing when the shrink fit is installed. Therefore, appropriate anti-rust measures are required. It is necessary to disassemble the bearing when inspecting or replacing parts on a regular basis. Generally, shafts and bearing boxes are almost always used, and bearings are often used. Therefore, the structural design should take into account that the bearing, shaft, bearing box and other parts will not be damaged when disassembling the bearing. At the same time, appropriate disassembly tools should be prepared. When disassembling a statically fitted ferrule, only the pulling force can be applied to the ferrule, and the ferrule must not be pulled through the rolling elements.
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