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Bearing installation

by:JNSN     2021-12-14

Whether the bearing is installed correctly will affect 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), cleaning bearings and bearing-related parts

(2), checking the dimensions and finishing conditions of related parts

(3), installation

(4), check after the bearing is installed

(5), supply lubricant

I hope that just before installation, Just opened the bearing package. 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 interference. It is usually pressed in with a press, or there is 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.

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