Centering Jaws

Centering jaws are specialized mechanical components designed to provide precise radial alignment and secure clamping of cylindrical or symmetrical workpieces in machine tools, particularly in lathes, milling machines, and CNC machining centers. They function as part of a centering mechanism that ensures the workpiece is accurately positioned relative to the machine's rotational or linear axes, minimizing runout and improving machining accuracy. These jaws typically feature hardened contact surfaces and adjustable mechanisms to accommodate various diameters while maintaining consistent centering force.

Centering jaws operate on the principle of simultaneous radial movement toward a common center point. When activated (mechanically, hydraulically, or pneumatically), multiple jaws move symmetrically inward or outward to contact the workpiece circumference at equidistant points. This synchronized motion ensures the workpiece's geometric center aligns with the machine spindle axis. The clamping force is distributed evenly around the circumference, preventing distortion while providing secure holding for machining forces.