We all know that most of the bearings need maintenance, and maintenance is also a troublesome thing. Relatively speaking, maintenance-free bearings can save a lot of time and trouble.

Bearing material, bearing accuracy, bearing lubrication, working environment, etc. are all reasons for the long life of the bearing. Lubrication can be said to be a key factor in determining whether the bearing is maintenance-free, because of the blood of the human body. Traditional grease bearings have different lubrication durations depending on the working environment. Such as high dust environment, frequent water washing environment, etc., due to the harsh working environment, the grease will quickly dry or emulsify, resulting in the need for frequent lubrication and maintenance of bearings, and the concept of maintenance-free bearings will no longer exist.

There is a special maintenance-free dust-proof bearing in China. The polymer material releases lubricating oil when working, providing the least and most effective amount of lubricating oil for the bearing; when the work stops, the lubricating oil is absorbed into the polymer under the action of capillary force Stored in materials.

The universal joint cross needs to be maintained by itself.