The knee joint cutting system which uses the robot

A knee joint cutting system using a robot is provided to cut a bone by using a tunnel type cutting method using a cantilever type cutter. A joint cutting system using a robot includes an arm of a variable position type. A motor is equipped in a leading end of the arm. A sleeve(14) is coupled to a housing of the motor. A cutter(10) connected to the axis of the motor is pivotally combined inside the sleeve. The cutter has a round bar. The cutter has a shaft(11) and a head(12). The shaft is coupled to rotate in the sleeve by the motor. A shaft is a cantilever type extended to the outside of the sleeve. The head is formed in the end of the shaft extended to the outside of the sleeve. The length of a cantilever of the shaft and the diameter of the head are 20-30 mm and 1.5-4.0 mm or 70-80mm and 4,0-6.0mm respectively.