Abstract: A crimping tool is used to attach a metal hub plate to a plastic hub for a data storage disk. The hub is bonded to the data storage disk, and the metal hub plate allows the disk to be magnetically clamped to a spindle of a disk drive. The metal hub plate has a four tabs which are bent into respective recessed areas of the hub. The tool includes a plunger which is directed against the metal hub plate which the plate is held in a lower die assembly. The plunger includes four crimping jaws which slide against angled surfaces of the plunger. The sliding motion causes the crimping jaws to move radially inward towards each other. The lower surface of each jaw includes a cam surface and a prow. The cam surface slides against the tab, bending it to a predetermined shape, and then the prow contacts a base of the tab to bend it beyond the predetermined shape.

Abstract: A crimping tool is used to attach a metal hub plate to a plastic hub for a data storage disk. The hub is bonded to the data storage disk, and the metal hub plate allows the disk to be magnetically clamped to a spindle of a disk drive. The metal hub plate has a four tabs which are bent into respective recessed areas of the hub. The tool includes a plunger which is directed against the metal hub plate which the plate is held in a lower die assembly. The plunger includes four crimping jaws which slide against angled surfaces of the plunger. The sliding motion causes the crimping jaws to move radially inward towards each other. The lower surface of each jaw includes a cam surface and a prow. The cam surface slides against the tab, bending it to a predetermined shape, and then the prow contacts a base of the tab to bend it beyond the redetermined shape.