What are the advantages of a self-centering vise compared with a fixed-jaw vise?

A self-centering vise uses synchronized opposing lead screws that drive both jaws simultaneously toward the fixture centerline, whereas a traditional single-station vise moves only one jaw toward a stationary reference jaw. The principal advantage of a MaxxVise self-centering vise is that the workpiece centerline remains fixed at the exact same spatial coordinate regardless of dimensional variations in the incoming raw stock. This constant centering is critical for 5-axis CNC machining, as it keeps the part aligned over the rotary table axis of rotation, balancing machine kinematics and preventing tool reach limitations.