Bearing core adjusting machine: The main content is the core adjustment and assembly (including screw tightening and screw loosening) of the air conditioner compressor cylinder and auxiliary bearing components. By measuring the combination size of crankshaft and piston and the inner diameter of bearing combination, the core adjustment is measured by means of gas-electric conversion, the clearance is adjusted to the specification range, and the screw is tightened according to the specified torque, so as to realize the assembly of cylinder and auxiliary bearing. The main action is "put the workpiece into the starting machine screw and automatically loosen the core adjusting screw and automatically tighten the screw to return to the original position and take out the workpiece".