Bearing installation and removal method

Whether the bearing is installed correctly affects the accuracy, life and performance. Therefore, the design and assembly department should fully study the bearing installation. It is hoped that the installation will be carried out according to the working standard. The items of the operating standard are usually as follows (1) Cleaning the bearing and bearing-related parts Whether the bearing is installed correctly affects the accuracy, life and performance. Therefore, for the installation of the bearing, the design and assembly department (2) check the dimensions and finishing conditions of the related parts (3) install (4) check after the bearing is installed (5) supply lubricant; hope to open it just before the installation Bearing packaging. General grease lubrication, no cleaning, direct filling with grease. Lubricating oil does not need to be cleaned in general. However, bearings for instruments or high-speed use should be cleaned with clean oil to remove the rust inhibitor coated on the bearings. Bearings with rust inhibitor removed are easy to rust, so they cannot be left unattended. Furthermore, bearings that have been sealed with grease can be used directly without cleaning. The installation method of the bearing varies depending on the bearing structure, fit and conditions. Generally, since most of the shafts rotate, the inner ring needs an interference fit. Cylindrical bore bearings are usually pressed in by a press, or by a shrink-fit method. 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, there is generally a lot of clearance fit, and the outer ring has an interference amount, which is usually pressed in by a press, or there is a shrink fit method for installation after cooling. When dry ice is used as a coolant and shrink fit is used for installation, moisture in the air will condense on the surface of the bearing. Therefore, appropriate anti-rust measures are required. Bearings need to be removed for periodic inspection or replacement of parts. Usually the shaft and the bearing housing will continue to be used almost, and the bearing will often continue to be used. Therefore, the structural design should take into account that the bearing, shaft, bearing housing and other parts will not be damaged when the bearing is disassembled, and appropriate disassembly tools should be prepared at the same time. When dismantling the ferrule with static fit, only the pulling force can be applied to the ferrule, and the ferrule shall not be pulled by the rolling elements.