Abstract: A swing arm arrangement moves and positions a magnetic head over a surface of a rigid rotatable magnetic disc of a magnetic disc store. The arrangement includes a swing arm, a permanent magnetic stator having stator end plates, and a bearing arrangement having ball bearings. The swing arm, magnetic stator and ball bearings are mounted on a bearing pin. The bearings are arranged on the pin at opposite sides of the arm and are carried by the stator end plates.

Abstract: A swing arm arrangement includes at least one magnetic head provided on at least one swing arm of a magnetic disc store. The swing arm has a recess formed by walls whose facing portions cooperate with opposite portions of a single stop cam to limit the pivotal movements of the arm.

Abstract: A carrying-arm arrangement for a magnetic disc store includes a movable carrying arm connected to at least one magnetic head. The magnetic head is shielded from spurious magnetic fields by a mu-metal shield which is connected to the arm and extends over the head.

Abstract: A method of fixing a magnetic head unit on a carrying arm of a movable carrying arm arrangement for a magnetic disc storage device. The arm is arranged to be movable on a mounting aid by means of its own bearing, a previously manufactured fixing part for the magnetic head unit being also arranged on said aid in a well defined position leaving a space between the carrying arm and the fixing part. The space is filled with a suitable bonding agent, such as an adhesive, which, after curing, connects the fixing parts to the carrying arm in the correct position (FIG. 5).