Embodiments of target retaining apparatus and substrate processing chambers incorporating same are provided herein. In some embodiments, a target retaining apparatus includes a housing including a first slot and a second slot; a cam movably disposed in the housing, wherein movement of the cam is constrained along the first slot; a retaining arm movably coupled to the cam, wherein movement of the retaining arm is constrained along the second slot; a linking member including a first end rotatably coupled to the cam and a second end rotatably coupled to the retaining arm; and a biasing element biasing the cam towards a first position in which the retaining arm extends away from the housing.