After checking bearing orientation in the rolling mill and recording, select a special roll bearing maintenance effect record card to record bearing seat number, roll number, frame number, bearing orientation on the rolling mill, bearing area of outer ring, tonnage of rolled products, bearing operation hours and other data.The card should be kept up to date and easily accessible to repair personnel.Load bearing measurement data and other test details in the blank space at the bottom of the record card.

       1.Bearing cleaning.

In the process of cleaning the bearing, all shedding, water and residual smoothing agent should be removed, as well as any other dirt that will constitute severe wear of the bearing.According to the scale or the number of bearings to be cleaned, the cleaning method and cleaning agent selected for cleaning bearings are determined. Small bearings or a few bearings can be used with oil, mineral oil or other commercial solvents.For large bearings or multi-volume bearings, neutral oil can be used to clean in the cleaning chamber, with a viscosity of 22cSt (or 100%, 100SUS) at 40% neutral oil.

         2.View the bearing, including view the appearance and minor repair.

On the inner ring of the roller that can be removed or roller appearance, if small spalling or epidermal crack is found, metal peeling is grinded with grinding machine commonly, and polished edge of peeling surface.Bearing wear should be checked regularly, and bearing wear can be evaluated by measuring bearing clearance.Inspect and repair the bearing seat as required, or inspect and repair the roll neck as required, and then reinstall the bearing with the bearing seat on the roll.

        3.Lubricated bearings.

Because of the rapid development of aluminum industry in our country have been produced and imported many modern four or six roller mill, the mill has a large rolling force and rolling speed high characteristics, requirements of form a complete set of rolling bearing and for equipment on the rolling products smoothness excellent viscosity-temperature property, oxidation came, anti-rust property, abrasion resistance, etc.At present, no. 220 closed gear oil with medium load is mostly used as the bearing smoothing agent for domestic aluminum rolling mills.The smooth agent has the function of reducing wear, taking away the heat occurred in the conflict, corrosion and rust prevention. Due to the shortcomings of this smooth oil, such as high viscosity, high flash point, large sulfur content, poor annealing cleaning function, etc., in foreign countries, the WYTOLB220 bearing without stains of the aluminum rolling mill roll of ESSO company in the United States,The smooth oil has good anti-wear function, oxidation and quiet function, good cleaning and annealing function, and no oil pollution aluminum rolled products.

Recommended amount of lubricating grease: the filling amount of smooth grease, to fill the bearing and bearing housing space 2/3 or 1/3 is appropriate, should not be too smooth.After each roll repair and grinding, the amount of grease is recommended to be 1/5 of the initial amount.The compensating period of smooth grease is related to the structure, speed, temperature and environment of the bearing. Users can adjust it according to the actual operating environment and keep clean smooth grease in the bearing under reasonable conditions.