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Self-lubricating bearings, also known as graphite copper sleeves or oil-free bearings, are a special type of sliding bearings. They are based on metal materials (such as high-strength brass), use graphite and silver disulfide as solid lubricants, and are made through special processes. The characteristic of this bearing is that its solid lubricant has uniform gaps and can contain a certain amount of lubricating oil. When working under oil-free or low-oil conditions, through frictional heat, the lubricating oil and solid lubricant will combine and gradually distribute to the friction surface to form a lubricating film, thereby achieving the effect of reducing the friction coefficient and improving wear resistance.
Self-lubricating bearings and other bearings have significant differences in lubrication methods, maintenance requirements, applicable occasions, and costs. Users should make comprehensive considerations based on the specific use environment and needs when choosing.

1. Lubrication method
Self-lubricating bearings: Self-lubrication is achieved through special internal structures and materials (such as inlaid graphite, solid lubricants or oil-containing bronze, etc.). No external lubricant is required, which reduces the consumption and replacement frequency of lubricants.
Other bearings: such as ball bearings, roller bearings, etc., usually rely on external lubricants (such as oil or grease) for lubrication. Lubricants need to be added or replaced regularly to ensure the normal operation of the bearings.

2. Maintenance requirements
Self-lubricating bearings: Due to their self-lubricating characteristics, they have low maintenance requirements. Under normal use, they can be maintained for a long time, reducing maintenance costs and downtime.
Other bearings: Lubricants need to be checked and replaced regularly to ensure the lubrication effect and normal operation of the bearings. The maintenance frequency is high, which increases maintenance costs and downtime.

3. Applicable occasions
Self-lubricating bearings: Suitable for some special occasions, such as high temperature, high speed, high precision, and severe pollution. In these environments, self-lubricating bearings can reduce the frequency and cycle of lubrication and reduce the difficulty of machine maintenance.
Other bearings: Suitable for some conventional occasions, such as machines and equipment that do not require high speed, high temperature, and high precision. In these occasions, other bearings can meet basic operation requirements.

4. Cost
Self-lubricating bearings: Due to higher technical requirements, production costs are also higher. Therefore, their prices are usually higher than ordinary bearings. But in the long run, due to low maintenance costs and long service life, the overall cost of self-lubricating bearings may be lower.
Other bearings: The production cost is relatively low and the price is more affordable. However, in the long-term use, due to the need for regular lubricant replacement and maintenance, the overall cost may gradually increase.

In the process of purchasing bearings, you can choose suitable accessories according to your actual working conditions and needs to help your business. Zhejiang Mingxu Machinery Manufacturing Co., Ltd. can help you choose the most suitable self-lubricating bearings and materials for your actual situation, reduce costs and increase efficiency for you, please contact us: [email protected].