Abstract: An adjustable angle workpiece positioning disc includes a partial quarter section defining confronting and intersecting surfaces that form an orthogonal angle therebetween. A central through hole located at the center of the disc. Disc coordinate axes originated at the center of the central through hole. Pluralities of angle through holes are arrayed about the central through hole. The disc is mountable to the plate by doweling the central through hole with a dowel pin receiving hole and by doweling one angle through hole with a dowel pin receiving hole in accordance with a desired revolved angle between the disc coordinate axes and the plate coordinate axes.

Abstract: A vise jaw plate includes a plurality of equally sized holes arranged in a pattern and extending through a front side of the vise jaw plate which cooperate with dowel pins and work holders to position and support a work piece. Horizontally spaced mounting bores are arranged for cooperative alignment with vise jaw mounting holes to permit the attachment of the vise jaw plate to the vise jaw. The mounting bores include a first frustoconical portion, a second frustoconical portion and a straight bore portion joining the confronting narrow ends of the first and second frustoconcial portions. The mounting bores and the vise jaw mounting holes have offset center-lines that become coaxially aligned during attachment of the vise jaw plate to the vise jaw causing the vise jaw plate to become fully seated against a deck surface of the vise.

Abstract: An adjustable angle workpiece positioning disc includes a partial quarter section defining confronting and intersecting surfaces that form an orthogonal angle therebetween. A central through hole located at the center of the disc. Disc coordinate axes originated at the center of the central through hole. Pluralities of angle through holes are arrayed about the central through hole. The disc is mountable to the plate by doweling the central through hole with a dowel pin receiving hole and by doweling one angle through hole with a dowel pin receiving hole in accordance with a desired revolved angle between the disc coordinate axes and the plate coordinate axes.