Conforms to conventional standards. type 5-1 is not applicable to the Mechanical ball bearing Factory occasions where the rolling elements run directly on the surface of the shaft or the seat hole, unless the corresponding shaft or the seat hole is manufactured in accordance with the technical conditions of the rolling bearing bearing component.
The revolution recorder of the one-way needle roller bearing fatigue bearing life testing machine can accurately record the total revolutions of the bearing fatigue test, so that it can be conveniently compared with the calculated results. When the bearing is in actual use, the load it bears is abnormally distributed (for example, due to misalignment of the axis, large deformation of the housing or shaft, centrifugal force of the rolling elements or other high-speed effects, and the use of a particularly large clearance for the radial bearing Or it may be caused by preloading etc. Type of bearing, because this gap affects the load carrying capacity of the contact area.
The scope of application of the basic rating life equation The basic rating life equation 5-1 is applicable to the calculation of the rated fatigue life of rolling bearings with the following technical conditions; the outer dimensions of the bearing can be selected from the bearing size range specified by the corresponding national standards; the bearing is of high quality hardened The steel is manufactured and processed with good quality; the surface quality of the bearing rolling contact surface (including geometric accuracy and material, etc. For example, there are filled deep groove ball bearings, or there is a considerable gap in the contact area between the rolling element and the raceway of the ring.
The basic rating life equation 5-1 is not applicable. The application of the basic rating life equation is restricted. In order to offset such a deviation, the result calculated according to formula 5-1 must be multiplied by the corresponding correction coefficient.), when calculating its basic rated life according to formula 5-1, satisfactory results cannot be obtained. These bearings must be installed correctly, adequately lubricated, free of foreign impurities and not operated under extreme conditions. When these conditions are not met, the calculation results of Equation 5-1 will be biased
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