Reamer

The utility model relates to a reamer comprises drilling rod and reamer part spare, the drilling rod includes that drill bit, reaming axle, spacing axle and universal driving shaft constitute, reamer part spare includes at least one reaming unit, the reaming unit includes reaming ring utensil and stiff end, the drilling rod passes through the reaming axle inserts in the stiff end with reamer part spare carries out swing joint. When installing and use, will the drilling rod passes the reaming unit makes the stiff end install the drilling rod the reaming is epaxial to be connected, at this moment the drill bit is in in the reaming ring utensil, only need with the universal driving shaft of drilling rod bottom is connected with the electric drill, starts the electric drill, and the electric drill will drive the drilling rod and with the drilling rod is connected the reaming unit rotates, the reaming unit will carry out the processing to the processing article, and assembly and disassembly is convenient, easy ope