Abstract: A vacuum vice for holding a bowling ball when drilling holes or engraving the ball includes inner and outer o-rings seals which form inner and outer concentric vacuum chambers that work together to form a seal with a bowling ball having surface imperfections or engraving. The inner vacuum chamber holds the ball against the inner seal and a vacuum passageway applies the vacuum to the outer vacuum chamber which seats the ball against the outer seal.

Abstract: A vacuum vice for holding a bowling ball when drilling holes or engraving the ball includes inner and outer o-rings seals which form two vacuum chambers that work together to form a seal with a bowling ball having surface imperfections or engraving. The inner vacuum chamber holds the ball to a buoyant cup. The outer vacuum chamber seats the ball against a contoured, hard rim surface and is connected by a leakage path around the inner seal to a piston chamber which pulls on the buoyant cup to further seat the ball. The outer seal is mounted on a movable housing that automatically adjusts to the size of the ball.