Blank Pie Shaped Jaws provides full circle with the work piece. The pie jaws are recommended for fragile and thin walled parts, which are subject to distortion during clamping.
Blank Top Jaws are manufactured to extremely close tolerances to assure proper fit onto micro centric chucks. The blank jaws are typically machined on the chuck under load to suit the workpiece to be clamped. The steel jaw blanks can be carburized after rough machining, and then finish ground on the chuck.