Industries such as mining, agriculture, cement, textile and woodworking machinery have harsh working environments: high dust, high humidity, corrosiveness, strong vibration and many impurities. Ordinary pillow block bearings often suffer from abnormal noise, heat generation, seizure, lubrication failure and other problems in a short period of time. To extend the service life in harsh environments, it is necessary to strengthen four aspects: sealing, lubrication, installation and material.

The first is the sealing structure. Harsh environments must adopt multiple seals: a combination of double-lip oil seal + labyrinth seal + dust cover to form multi-layer protection and prevent dust, moisture, fibers and materials from entering the bearing interior. The service life of open or single-seal bearings is usually shortened by more than 50% in harsh working conditions.

The second is lubrication management. Extreme-pressure, wear-resistant, water-resistant and high-temperature long-life lubricating grease should be selected to avoid rapid loss or emulsification of the grease. Replenish grease regularly but not excessively; excessive lubrication will increase the internal temperature and accelerate grease aging. Some high-intensity working conditions can adopt oil lubrication, which has better heat dissipation and lubrication effects.

The third is correct installation. Violent hammering on the bearing housing is strictly prohibited to avoid deformation of the housing; ensure the smoothness of the shaft surface and moderate fitting clearance; apply uniform locking force to prevent inner ring deformation or shaft surface damage. Installation misalignment is an important cause of premature failure of pillow block bearings.

The fourth is to select high-strength bearing housing materials. Cast iron housings are suitable for ordinary environments, while cast steel housings have higher rigidity and impact resistance, suitable for heavy-duty and high-impact working conditions. Heat-resistant bearings and high-temperature lubricating grease can be selected for high-temperature environments, and stainless steel pillow block bearings can be selected for corrosive environments.