What is the correct method for rust removal of thin-walled bearings?

Surface pretreatment method of thin-walled bearing anti-rust agent:

　　1. Surface cleaning: When cleaning, select the appropriate method according to the properties of the surface rust inhibitor and the conditions at that time. Generally, solvent cleaning, chemical treatment and mechanical cleaning are adopted.

　　2. After the surface is dry and clean, it can be dried with filtered and dried compressed air, or dried in a dryer at 120-170℃, or wiped dry with a clean gauze.

Anti-rust oil painting method:

　　1. Immersion method: soak some small thin-walled bearings in anti-rust grease to allow a layer of anti-rust grease to adhere to the surface of the bearings. 2. The brushing method is not suitable for outdoor construction equipment or special-shaped products that are not suitable for immersion or spraying. When brushing, you should pay attention to accumulation and prevent missing paint.

　　3. For some larger rust inhibitors, the spray method cannot be used for soaking. The clean air area generally uses filtered compressed air of about 0.7MPa for spraying.

　　Whether the thin-walled bearing is installed correctly directly affects the performance, precision and life of the bearing. Therefore, the design and assembly departments should fully study the installation of thin-walled bearings. During the installation process, the operation standards must be followed. The operation standards are as follows:

　　(1) Clean thin-walled bearings and thin-walled bearing related parts

　(2) Check the size and finish of related parts

　(3) Installation

　(4) Inspection after installation of thin-walled bearings

　(5) Provide lubricant

　　It is hoped that the thin-walled bearing package will not be opened just before installation. Generally, grease lubrication is performed without cleaning and grease is added directly. Lubricating oil generally does not need to be cleaned. However, for instrumentation or high-speed thin-walled bearings, the bearings should be cleaned with clean oil to remove the rust inhibitor applied to the thin-walled bearings. Thin-walled bearings are prone to rust after the rust inhibitor is removed, so they cannot be placed at will. In addition, thin-walled bearings that have been sealed with grease cannot be used directly.

　　The installation method of thin-walled bearings varies depending on the structure, fit and condition of the thin-walled bearings. Generally speaking, since most of the shaft is rotating, the inner ring needs to beInterference fit. Thin-walled bearings with cylindrical holes are pressed in by press-in or heat-installation methods. If it is a tapered hole, it is directly installed on the tapered shaft or installed with a sleeve.

When installed on the housing, there is more clearance fit and the outer ring has interference. It is usually pressed in with a press or cooled and then shrink-fitted. When using dry ice as a coolant, moisture in the air will condense on the surface of the thin-walled bearing as it cools and shrinks the fit.