Abstract: A cast composite sector gear including a hub made of a first material and an outer gear section made of a second material that is cast onto the hub. The hub is configured such that a secure mechanical bond can be created between the hub and the gear section when the gear section is cast onto the hub. The hub includes a base having a peripheral surface and a gear foundation that extends circumferentially from the peripheral surface about a portion of the base. The gear section is cast onto the gear foundation, and the gear section extends circumferentially about a portion of the hub.