Affect the service life of the double row cylindrical roller bearing different factors

First, the restrictions on the size of the bearing. Double row cylindrical roller bearing can usually install space is restricted. In most cases, the diameter of axle ( Or bearing inside diameter) Based on mechanical design or other design constraints. So bearing type and size of the choice is determined according to the inner diameter of the bearing. As a result, the main dimensions of the standard bearing table according to the international standard and diameter is compiled. Standard double row cylindrical roller bearing the size of the form is various, is best when mechanical device design with a standard bearing ( This design to the bearing is easy to purchase, just as an aside, here model does have some bearing on the catalogue, but some non-standard bearings in mainland China there is no spot, futures will be a long time, sometimes to consider when bearing selection so late time cost and the cost of replacement) Double row cylindrical roller bearing load, the load on the bearing, the nature, size, direction is changeable. Usually, the basic load rating on dimension table are displayed. Axial load and radial load, and so on, but also important factors is to select a suitable bearing. When the size of the ball and needle bearing fairly, double row cylindrical roller bearings are usually have higher load capacity and bear the larger vibration and shock loads. Second, the speed of the bearing. Allow speed is according to the type of double row cylindrical roller bearing, size, precision, cage type, load, lubrication, and cooling way. Bearing table lists the standard precision bearings allow speed under oil lubrication and grease lubrication. Usually, deep groove ball bearings, automatic self-aligning ball bearings and cylindrical roller bearings are suitable for high-speed operation. Third, the tolerance of the bearing. Double row cylindrical roller bearing dimensional accuracy and rotation accuracy is according to ISO and JIS standard. For high-precision and high-speed machines, recommend the use of level 5 or above precision bearing, deep groove ball bearings, angular contact ball bearings and cylindrical roller bearing is suitable for high precision mechanical operation. Rigidity, when bearing rolling element and raceway contact pressure, will produce elastic deformation. Some mechanical need to minimize the elastic deformation. Roller bearing is smaller than ball bearings produced by elastic shape variables.