Positioning ring for connection of mandril with hardware tool

The utility model discloses a positioning ring for the connection of a mandril with a hardware tool, which consists of a ring body and a bolt, and is characterized in that: the ring body is formed bythe combination of two semi-ring bodies, one ring body thereof is connected with a bolt; and the joint parts of the two semi-ring bodies are both in S shape. The structure has the following advantages: the positioning ring is adopted to locate the length of the mandril inserted into the hardware tool, thus having the effects of high speed and accurate positioning; furthermore, the ring body is designed into two half parts, thus being convenient for the loading and unloading of the positioning ring on the mandril, and the S-shaped joints are automatically meshed at the joint. The structure is simple, compact and practical.