SCIENCE AND TECHNOLOGY ENGLIAH FOR MECHANICAL ENGINEERING Static And Dynamic Load In tables giving permissible load data for ball bearings. a distinction is often made between static and dynamic loads, i. e, with the bearing stationary or rotating. The permissible static load is smaller than the permissible dynamic load due indentation he possibility of permanent indentation‖压痕 ( flattening of the contact areas when the bearing is at rest). This phenomenon is called Brinelling. Brinell Some permanent indentation is almost‖布里涅耳 unavoidable due to the high contact stresses however, it has been found that permanent deformations smaller than 10-4 times the rolling element diameter usually do not unfavorably affect the bearings operationSCIENCE AND TECHNOLOGY ENGLISH FOR MECHANICAL ENGINEERING Static And Dynamic Load In tables giving permissible load data for ball bearings, a distinction is often made between static and dynamic loads, i.e., with the bearing stationary or rotating. The permissible static load is smaller than the permissible dynamic load due to the possibility of permanent indentation (flattening of the contact areas when the bearing is at rest). This phenomenon is called Brinelling. Some permanent indentation is almost unavoidable due to the high contact stresses, however, it has been found that permanent deformations smaller than 10-4 times the rolling element diameter usually do not unfavorably affect the bearing's operation. indentation 压痕 Brinell 布里涅耳