The utility model discloses a disposable sterile steering
drill bit which comprises a steering sleeve, a
drill bit body is placed in one end of the steering sleeve, a transmission rod is placed in the other end of the steering sleeve, one end of the transmission rod extends out of the steering sleeve, and a
handle is fixedly connected to the extending position of the transmission rod. A locking
assembly is arranged at the position, close to the
handle, of the steering sleeve and used for fixing connection between the transmission rod and the steering sleeve. A first taper gear is arranged on the end face of the end, close to the
drill bit, of the transmission rod, a second taper gear is arranged on the end face of the end, close to the transmission rod, of the
drill bit, the bevel gears are meshed with each other, and the transmission rod and the
drill bit are fixedly connected through meshing transmission between the first taper gear and the second taper gear. According to the utility model, the detachable design is adopted, the selection and
assembly of various
drill bit specifications are facilitated, the use is convenient, the connection structure is simple and firm, the operation is convenient, and the
transmission ratio of transmission forces generated by the transmission of the
handle is 1: 1, so that the force of the handle can be manually controlled, and the risk of
cross infection is reduced.