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The influence of bearing installation on bearing life

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 work standard items are usually as follows:   (1) check the size and finishing of related parts;   (2) installation;   (3) supply lubricant.   (4) Clean the bearing and its related parts;    (5) Check after the bearing is installed;    Hope to open the bearing package just before installation. 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. General grease lubrication, do not clean, directly fill with grease. In addition, bearings that have been packed with grease can be used directly without cleaning. Bearings with anti-rust agent removed are easy to rust, so they should not be left alone.  When installed on the shell, generally there is a lot of clearance fit, and the outer ring has an interference. It is usually pressed in by 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.  The installation method of the bearing varies with the bearing structure, fit, and conditions. Generally, since most of the shaft rotates, the inner ring needs an interference fit. In the case of a tapered hole, install it directly on the tapered shaft or install it with a sleeve. Bearings with cylindrical bores are usually pressed in with a press or hot-fitting methods are often used.
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