How to Choose the Limit Speed of the Single Direction Thrust Ball Bearings?

Single direction thrust ball bearings limit speed refers to the load and lubrication conditions, the bearing can withstand the highest thermal equilibrium stability of the temperature when the rotation fan. It is not only related to the bearing structure type, size, accuracy, travel division, cage material and structure, but also related to the lubrication method, the nature of lubricant, the size and direction of the cutting load and the heat dissipation condition. Bearing product samples are generally listed on the limit speed of oil and grease lubricated bearings respectively. However, it should be clear that the limiting speed on the sample is applicable to the equivalent dynamic load Pr less than or equal to 0.1Cr (rated dynamic load), normal lubrication and cooling conditions, and common level (0 level) tolerance of radial or thrust bearings. Therefore, the selection of bearings, in principle, the maximum working speed of the bearing should be lower than the limit speed of the bearing, otherwise it will cause excessive bearing heat, damage lubrication efficiency, reduce bearing life.

Therefore, if the selected single direction thrust ball bearings limit speed can not meet the requirements, you can take some measures, for example, change the lubrication method (can use oil spray lubrication, spray lubrication or oil and gas lubrication), improve the cooling conditions, improve the accuracy of the bearing, adjust the bearing clearance or change to special bearing materials or cage structure type, etc.. Generally speaking, deep groove ball bearings, angular contact ball bearings and cylindrical roller bearings have higher limit speed; ultra-light, extra-light series bearings have better limit speed than other series bearings: the bearing with solid cage is higher than the bearing with stamping cage; the limit speed of thrust bearing is relatively low, when the working speed is high, and bear larger combined axial and radial load, can The combination of radial bearing and angular contact bearing can be used to increase the limiting speed.

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