Hold and drive tool with disengagement capability

A hold and drive tool for fastening parts together with a stud and nut, the tool comprising:

• a tool body including a drive member therein, the drive member configured to be rotationally driven by a power source;
• a nut drive member operatively engaging the drive member to be driven by the drive member, the nut drive member including a nut engaging portion configured to be slidably received on the nut and rotate the nut relative to the stud;
• a hold member including a hold shaft connected to a hold bit, the hold bit located in the nut drive member and configured to be slidably received on a hold feature on the stud to prevent the stud from rotating relative to the hold member;
• a clutch secured to the tool body and the hold shaft, the clutch configured to selectively allow for and prevent rotation of the hold shaft relative to the tool body;
• a torque sensor operatively engaging the hold and drive tool to determine a torque value;
• a controller operatively engaging the clutch and the torque sensor, the controller configured to cause the clutch to allow for rotation of the hold shaft relative to the tool body when the torque sensor senses a predetermined torque value;
• and
• wherein the stud is a tapered stud and the predetermined torque value is calculated to be high enough that a friction between the tapered stud and the parts is high enough to keep the stud from rotating as the nut is screwed onto the stud.