Place raisins in a large bowl; cover with boiling water and let stand for 5 minutes. Drain well and set aside.
In another large bowl, cream shortening and sugar. Add eggs, one at a time, beating well after each addition. Beat in vanilla. Combine the flour, cream of tartar, salt and baking soda; add to creamed mixture alternately with milk. Stir in the walnuts, pineapple, cherries, coconut and raisins.
Spoon into nine greased 5-3/4x3x2-in. loaf pans. Bake at 300° for 65-75 minutes or until a toothpick inserted in the center comes out clean. Cool for 10 minutes before removing from pans to wire racks.
Editor's Note: Fruitcakes can be baked in two batches. Refrigerate batter until baking.