ZZ Bearings Need To Be Carefully Inspected

Time：2020.08.26  Source：Roller Bearings Suppliers

With the progress and development of society, mechanization has been widely used in production and life. As an indispensable part of machinery, ZZ bearings will be used more and more widely, because ZZ bearings are used as long as there is rotation.

ZZ bearings are mainly used in machinery to support and reduce friction, so the accuracy and noise of ZZ bearings are directly related to the use and life of the machinery.

ZZ bearing model is generally selected by the user's technical personnel according to the use conditions and load bearing of the supporting products. If the ZZ bearing fails to meet the requirements for use, it should be recommended to re-select the model as soon as possible, but unless there is no problem in selecting the model for special products.ZZ Bearing (Shanghai) Co., Ltd provides ZZ Bearing 22324-2CS, click here to contact us.

ZZ bearings are high-precision products. Improper assembly can easily damage the ZZ bearing raceway and cause damage to the ZZ bearing. ZZ bearings should have special molds when assembling them, and they can't be knocked at will. When pressing into the shaft, only small circles can be stressed, and large circles can only be stressed. Air pressure or hydraulic pressure is required for assembly, and the upper and lower molds should be outside the horizontal state during press-fitting. If there is a tilt, the ZZ bearing channel will be damaged due to force, which will cause the ZZ bearing to produce noise.

The life of ZZ bearings is closely related to manufacturing, assembly, and use. Every link must be done well in order to make the ZZ bearings in the best operating condition and extend the service life of the ZZ bearings.

In order to maintain the original performance of ZZ bearings in a good condition for as long as possible, maintenance, inspection and repair are necessary to prevent accidents before they occur, ensure the reliability of operation, and improve productivity and economy. Maintenance should be carried out regularly in accordance with the operating standards of the mechanical operating conditions. The contents include monitoring the operating status, replenishing or replacing lubricants, and regular disassembly inspections. As maintenance items during operation, there are ZZ bearing's rotating sound, vibration, temperature, lubricant state, etc.

ZZ bearing cleaning: 

When disassembling the ZZ bearing for maintenance, first record the appearance of the ZZ bearing, confirm the remaining amount of lubricant, and then clean the ZZ bearing after sampling the lubricant for inspection. As a cleaning agent, gasoline and kerosene are commonly used. The dismantled ZZ bearing is cleaned, divided into rough cleaning and fine cleaning. They are placed in the container respectively, and a metal mesh bottom is placed first, so that the ZZ bearing does not directly contact the dirt of the container. During rough cleaning, if the ZZ bearing is rotated with dirt, it will damage the rolling surface of the ZZ bearing, so care should be taken. In the rough cleaning oil, use a brush to remove grease and adhesions. After it is roughly clean, switch to fine cleaning. Fine washing is to clean the ZZ bearing carefully while rotating it in the cleaning oil. In addition, the cleaning oil should always be kept clean.Click here to learn more information about ZZ Bearing 22326-2CS.

Inspection and judgment of ZZ bearing: 

In order to judge whether the disassembled ZZ bearing can be used, it should be checked after the ZZ bearing is cleaned. Check the state of the raceway surface, the rolling surface, the mating surface, the wear of the cage, the increase of the ZZ bearing clearance, and the damage that is not related to the decrease of dimensional accuracy. For non-separable small ball bearings, use one hand to support the inner ring horizontally and rotate the outer ring to confirm whether it is smooth. Separate bearings, such as tapered roller bearings, can separately inspect the rolling elements and raceway surfaces of the outer ring. Because large bearings cannot be rotated by hand, pay attention to checking the appearance of rolling elements, raceway surfaces, cages, rib surfaces, etc. The higher the importance of ZZ bearings, the more careful inspection is required.

The market requirements for various mechanical devices and instruments using rolling bearings have become increasingly stringent, and the requirements and performance of ZZ bearings have become increasingly diversified. In order to choose the most suitable ZZ bearing from a large number of structures and sizes, it is necessary to study from various angles. When selecting ZZ bearings, generally, consider the difficulty of ZZ bearing arrangement, installation, and disassembly as the shaft system, the space and size allowed by ZZ bearings, and the marketability of ZZ bearings to roughly determine the structure of ZZ bearings. Secondly, while comparing the design life of various machines using ZZ bearings and the various endurance limits of ZZ bearings, the size of ZZ bearings is determined. When selecting ZZ bearings, it is often biased to consider only the fatigue life of ZZ bearings. The grease life, wear and noise caused by grease aging also need to be fully studied. Furthermore, according to different applications, it is necessary to select specially designed ZZ bearings for accuracy, clearance, cage structure, grease, etc. requirements. However, there is no certain order or rules for selecting ZZ bearings. The priority should be the conditions, performance, and most relevant items required for ZZ bearings, which is especially practical.

ZZ Bearing (Shanghai) Co., Ltd supply Variety sizes Thrust spherical roller bearings , high quality and best after-sale service to help you enjoy one-stop shopping. Our products are exported to more than 100 countries and regions around the world. Customers are very satisfied with our products and have established a long-term cooperative relationship with our company.