Abstract: A labeler for the placement of a label, having a central aperture and a peripheral edge, onto a surface of a disk, having central hole and an outer edge, comprising a disk positioning member having points of contact with the spindle hole and/or the outer edge of the disk, for positioning the disk; a label positioning member having points of contact with the central aperture and/or peripheral edge of the label, for positioning the label; and a joining member interconnected with said disk positioning member and said label positioning member, having a first position in which the label and the disk are spaced and a second position in which the disk and the label are contacted. The label positioning member is preferably a tapered cylinder which is adapted to be inserted in the central aperture. The disk positioning member is preferably a cylindrical rod. The tapered cylinder and cylindrical rod may be an integral structure.