After the installation of Timken bearing, in order to check whether the installation is correct, operation inspection shall be carried out. Timken Plain Bearing Small machinery can be rotated by hand to confirm whether it rotates smoothly. The inspection items include poor operation caused by foreign matters, scars and indentation,unstable torque caused by poor installation and poor processing of mounting base, excessive torque caused by too small clearance, installation error and sealing friction, etc.