Industrial electrostatic precipitator systems are one of the highly effective dust filtration and air cleaning methods currently used in thermal power plants. Besides such advantages, the electrostatic precipitator system also has major disadvantages due to working in harsh environments with high temperatures and unlubricated dusty environments. This leads to the mechanical parts and assemblies of the electrostatic precipitator system becoming worn and damaged quickly and requiring maintenance and replacement. This paper using a Box-Behnken design was employed to determine the relationship between the wear rate U (mm) under the following conditions: operating temperature (T) ranging from 80 to 120 ℃, dust concentration (B) from 40 to 100 g/m3, and load (P) from 300 to 500 N. This work demonstrates the significant influence of dust concentration and load and temperature factors that simultaneously affect the amount of wear and reduce the life of the shaft – bushing friction pair in the electrostatic precipitator system.