Operating temperature bearing lubrication part is an important basis for the choice of grease. The typical components using grease bearings, the view of the relationship of the bearing temperature and grease life, the bearing temperature rise to 10-15 ℃, the life of the grease is to be reduced by about 1/2. In general, the bearing outer ring temperature is lower than the inner temperature of about 15 ℃. Bearing temperature and the internal temperature of the medium in the medium and low speed (3000-5000r/min) approximation.
For indoor use machine bearings, machine tools, the intermittent start the motor, hand tools, instruments and precision machinery, etc., the normal operating temperature range of 10-50 ℃. Mechanical bearings for transport machinery, construction machinery, agricultural machinery and other outdoor work, the general operating temperature varies with the atmospheric temperature changes. Atmospheric temperature change from the majority of our -40-40 ℃. Increased load, speed, ambient temperature, grease overfilled as well as long-term continuous work bearing temperature. For example, in the neck load 1470N (150kgf), the speed the 8000r/min conditions under work 240 bearing temperatures up to 40-70 ° C. Traveling along the Avenue of the truck bearing the temperature up to 40-80 ℃. Large generator bearing temperature can reach 89-90 ℃, aircraft landing gear, high temperature motor rolling bearing temperatures up to 150-200 ℃ or higher.
The use temperature of the bearing with a heat treatment process of the bearing may be a conventional heat treatment process of the tempering temperature is 150 degrees, the maximum use temperature of the bearing is generally required in the range of 120 degrees, if there are special requirements, can be used to 200,250 degrees or The higher tempering temperature, then the temperature can reach 170,230 or higher.
Bearing rings and rolling elements, heat treatment process to ensure bearing less than 150 degrees, the size and stability. Higher temperature, it is necessary to use a special heat treatment method need bearing steel bearings in a corrosive environment, standard stainless steel bearings in code prefix "S" and the suffix "W203B engage in corrosive." (bearing in code can mean a reference site, "bearing code the letter mean (1 - 10)" series), this bearing is the same size and carrying capacity and overall hardened bearing steel bearing In order to maintain its corrosion resistance, in the process of installation and use of the surface can not be damaged.
How to determine the contents of the bearing Can be used again, and decided to come back to after considering the extent of bearing damage, machine performance, the importance of operating conditions, check cycle. Inspection results, if bearing damage and abnormal situation, hurt a check Ming reason to develop countermeasures.


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