Patent ID: 7797840

Claim:
A stud punch head for a power tool, the stud punch head comprising: a head housing; a first arm including a first roller movably coupled to the head housing, the first arm supporting a punch; a second arm including a second roller movably coupled to the head housing and relative to the first arm, the second arm supporting a die opposite the punch; and a drive mechanism positioned at least partially within the head housing and operatively coupled to a motor of the power tool, the drive mechanism including a cam having two wings, each wing including an inwardly curved surface, an outwardly curved surface, and an end surface connecting the inwardly curved surface and the outwardly curved surface, the cam being configured to be rotated by the motor to at least move the first arm and the second arm toward each other, and the cam also being configured to engage the first roller and the second roller such that the first roller and the second roller ride along an associated inwardly curved surface of the cam to move the first arm and the second arm.