Abstract: A rotary actuator having at least two legs or arms extending from the distal end of a body containing a bore through which passes a shaft about which the body rotates. A frame extends from the opposite end of the body to support a flat coil which, when the actuator is assembled, cooperates with magnets to function as a rotary "voice coil". The entire structure (i.e. the legs, body and frame) is formed as a monolithic structure by casting aluminum or some other non-magnetic metal. Other manufacturing techniques may be used, such as investment casting, machining or extrusion. Hence, no assembly is needed to join the legs or the coil-support frame to the body. Flexure elements are secure to the legs and each flexure element has a hollow pin that is placed within an opening of a respective actuator leg. A ball is driven downwardly through each hollow pin to expand that pin laterally and thus wedge the flexure into firm contact with a mounting pad on the leg.