The limit speed issue of NSK bearings, bearings of knowledge

A lot of friends at the time of purchase NSK bearings, always ask me a question, is the speed limit. Today, small make up just finishing a little about this knowledge, I hope it can help you. 1) Standard ( G） Tolerance level bearing; 2) Centripetal bearing only bear radial load bearing only bear axial load; 3) = 0. 1C( C the basic dynamic load rating of bearing) ; 4) NSK import bearing seat and rigid shaft; 5) Normal lubrication cooling conditions. When bearing in 0. 1 c load conditions during operation, because the rolling element and raceway contact surface between the contact stress increases, the bearing temperature rise, the performance of the lubricant is relatively worse, therefore, the limit of bearing rotating speed will be reduced accordingly. For C / = 10, due to the lower limit speed is very small, so it can not be considered, namely the f1 = 1. Centripetal bearings for joint under load, because of its number increasing, the load of rolling body friction resistance increases, higher calorific value, lubrication and cooling conditions, but also increase the force applied to keep the rack, therefore, must according to the size of the bearing type and load Angle, NSK bearings will limit speed multiplied by a lower coefficient of f2. If the selected bearing speed limit speed cannot satisfy the use requirement, can use some improved technology measures to improve, to achieve a satisfactory requirements. Such as increasing bearing poor tolerance level; Appropriate increase of clearance. Use special materials and the structure of the improved cage; Change the lubrication method, such as lubrication oil and gas, oil mist and spray; Improve the cooling condition, etc.