High speed brushless motor for spindle driver. The motor includes mounting bracket and the pulley which can fitted into DMC-III machine. The maximum motor speed is 12,000 rpm. The pulley ration from motor to the spindle is 2 for ER11 and 1.5 for ER16. Therefore, the maximum spindle speed is 18,000 rpm for ER16 and 24,000 rpm for ER11. The diameter of the motor is about 2". Since the torque of this motor is limited, it is only recommend to used with ER11 spindle where the maximum tool size is 1/4".