Worm gear reducer bearings are an important ring in the reducer, and are an important part of contemporary machinery and equipment. Its main function is to support the mechanical rotating body, reduce the friction coefficient during its movement, and ensure its rotation accuracy. Due to the interaction of the various parts of the reducer in use, the retaining ring of the fixed bearing outer ring (or inner ring) and the shoulder of the bearing outer ring on the end cover will produce a certain amount of wear. These inconspicuous wear will cause Make the bearing have a gap, which will cause the bearing to rust after a long time.

Before the worm gear reducer rusts, we need to know that the grease inside the bearing plays a role in separating the steel ball from the inner and outer raceways. Using the viscosity characteristics of the grease, it attaches to the surface of the steel ball and raceway to separate The metal interface between the steel ball and the inner and outer races reduces the abrasion of the metal surface and protects the metal from air and water corrosion, reduces vibration and noise, and enables the bearing to rotate smoothly. However, after the intercalation grease deteriorates, the viscosity will change, the oil film breaks, and the separation function and adhesion properties of the intercalation grease will disappear. The consequence of this is that the acidic components produced by the insulating paint will directly oxidize the metal surface, causing the bearing to rust. It will also cause the steel ball to directly contact with the inner and outer raceways, and wear or break during rotation, which will increase the noise.

The main reason for the rust of the worm gear reducer bearing is the acid component generated by the water decomposition of the lacquer curing material. The main acid component produced by the insulating paint is formic acid. There is a close relationship between the occurrence of formic acid and the degree of rust. The grease absorbs the acidic components volatilized from the paint, causing the grease to deteriorate, and this acidic component promotes the hydrolysis of the lubricating grease. As a result, the concentration of the acidic component increases, which causes the bearing to rust.