Abstract: A crimping apparatus has, at each crimp location, a pair of opposing crimping jaws, which, when driven closed, crimp a pin located between the jaws. The jaws are driven open and closed by a sliding drive member having two grooves therein, one on each side of the centerline joining the center of the closed jaws and the center of the drive member. The grooves are at an angle with respect to the line joining the center of the closed jaws and the center of the drive member. The jaws are each provided with a projection which is engaged in the associated groove in the drive member, whereby when the drive member is reciprocated toward and away from the jaws, the camming action of the grooves and projections on the jaws causes the jaws to close and open, respectively. The camming angles are equal, thus causing the jaws to move to their closed and open positions in equal increments of motion.