Installation of imported bearings: Whether the imported bearings are installed correctly affects the accuracy, life and performance. Therefore, the design and assembly department should fully study the installation of imported bearings. 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 imported bearings and the related parts of the imported bearings; (2) Checking the dimensions and finishing conditions of the related parts; (3) Installation; (4) Inspection after the imported bearings are installed; (5) ) to supply lubricant. It is hoped that the imported bearing packaging will be opened just before the installation. General grease lubrication, no cleaning, direct filling with grease. Lubricating oil does not need to be cleaned in general. However, imported bearings for instruments or high-speed use should be washed with clean oil to remove the rust inhibitor coated on the imported bearings. The imported bearing with the rust inhibitor removed is easy to rust, so it cannot be ignored. Furthermore, the imported bearings that have been sealed with grease can be used directly without cleaning. The installation method of imported bearings varies depending on the structure, fit and conditions of imported bearings. Generally, because most of the shafts rotate, the inner ring needs an interference fit. Cylindrical bore imported bearings are mostly pressed in by a press, or by a hot-loading method. In the case of a tapered hole, install it directly on the tapered shaft, or install it with a sleeve. When it is installed 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 the coolant and shrink fit is installed, the moisture in the air will condense on the surface of the imported bearing. Therefore, appropriate anti-rust measures are required.