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How to select lubricating grease for Dalian bearings?

* : * : admin * : 2022-12-05 * : 13
In order to give full play to Dalian bearing and maintain its due performance for a long time, it is necessary to clean, maintain and lubricate the bearing. In particular, bearing lubrication plays a very important role in bearing operation. Generally, grease is mainly used in bearing lubrication. Proper grease can not only reduce the running friction of the bearing, but also extend the service life of the bearing to a certain extent. How to select lubricating grease for bearings? Today, I will introduce the selection methods and precautions of bearing grease for you. I hope it will be helpful to you.
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1、 Grease selection method
1. Understand your needs
(1) Bearing operating temperature. For machine bearings used indoors, such as machine tools, hand tools, precision machinery and intermittently started motors, the general operating temperature range is 10-50 ℃. For mechanical bearings working outdoors such as transport machinery, construction machinery and agricultural machinery, the general working temperature will certainly change with the change of atmospheric temperature. The atmospheric temperature in most regions of China changes from - 40-40 ℃. The temperature of rolling bearings increases with increasing load, accelerating speed, rising ambient temperature, too full grease and long-term continuous operation. For the wheel bearings of trucks traveling along the main road, the temperature can reach 40-80 ℃. The temperature of large generator bearing can reach 80-90 ℃, and the temperature of aircraft landing gear, high-temperature motor and other rolling bearings can reach 150-200 ℃ or higher.
(2) Bearing working environment. Lubricating grease with good anti-corrosion performance shall be selected for bearings working in humid environment. When the machinery working in a humid environment needs to stay for a long time, the bearing surface will form condensate due to cooling after staying. In order to prevent rust, non absorbent calcium base grease should be selected. When there is a lot of dust around the bearing and a curved path is used for sealing, it is hoped that the lubricating grease will also play a sealing role, and the lubricating grease with small needle penetration should be selected. When the bearing medium has strong chemical effect, the lubricating grease with anti-corrosion additives shall be selected.
(3) Dynamic performance of Dalian bearing. For grease lubricated bearings, when the friction is required to be very small or the starting friction torque is required to be small at low temperature, the lubricating grease with similar low viscosity and high penetration composed of synthetic base oil shall be selected. For small motor bearings requiring low noise, filtered grease or base oil grease with high viscosity shall be selected to reduce bearing noise.