The accuracy, performance, life and other indicators of miniature bearings are determined by many factors, including whether the bearing is installed correctly or not and whether it is used properly. Therefore, special attention should be paid to the installation and use of bearings. Open the bearing package just before installing the bearing to prevent foreign matter such as dust from entering the bearing, which will affect the performance and life of the bearing. Generally, bearing grease can be filled directly without cleaning. Ordinary bearings can be filled with lubricating oil without cleaning. If it is an instrument or high-speed bearing, it is necessary to remove the rust inhibitor on the bearing with clean cleaning oil before installing it. Bearings that have been filled with grease can be directly mounted. 1. Installation steps of miniature bearings: (1), cleaning the bearing and bearing related parts (2), checking the size and finishing of the related parts (3), installing the bearing (4), checking after installing the bearing (5) , Supply lubricants for bearings with different structures, coordination and installation conditions, and the installation methods are also different. Generally, multi-axis selection is required, and the inner ring of the bearing needs an interference fit. Cylindrical bore bearings are mostly pressed in by a press or by hot-loading. In the case of tapered holes, directly install it 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 the coolant and shrink fit is installed, the moisture in the air will condense on the surface of the bearing. Therefore, proper anti-rust measures should be taken. 2. The use of miniature bearings Because bearings are precision parts, their use must also be carried out with caution. Precautions for the use of miniature bearings: (1) Keep the bearing and its surroundings clean. Even small dust that cannot be seen by the eyes will affect the normal use of the miniature bearing. Therefore, it is necessary to keep the bearing environment clean so that foreign objects such as dust cannot enter the bearing. (2), use with caution. In use, it is necessary to avoid strong impact on the bearing, resulting in scars and indentations, which will become the cause of the accident. If the impact is severe, it will crack and break, so be careful. (3) Use appropriate operating tools. Proper tools must be used when using bearings, and substitute tools must be avoided. (4) Pay attention to the corrosion of the bearing. Sweat on your hands will cause the bearings to rust. Keep your hands clean and try to operate with gloves. 3. Damage to the miniature bearing If the bearing is damaged prematurely by accident and cannot be used continuously, it is the limit of quality use called failure or accident relative to the fatigue life. Generally, it is due to careless installation, use, and lubrication, foreign matter intruding from the outside, and insufficient research on the thermal effect of the shaft and housing. Regarding the damage state of the bearing, such as: the ring of the roller bearing, the rib of the rib, the reasons can be considered, the lack of lubricant, unsuitability, the defect of the oil supply and discharge structure, the intrusion of foreign matter, the bearing installation error, the deflection of the shaft If the curve is too large, these reasons will also overlap. Therefore, it is difficult to know the real cause of the damage only by investigating the bearing damage. However, if you know the machinery used for the bearing, the conditions of use, the structure around the bearing, and the situation before and after the accident, combined with the damage status of the bearing and several reasons, you can prevent similar accidents from happening again.