A centerless ground bar is a precision metal bar that is manufactured using the centerless grinding process to achieve extremely tight tolerances, smooth surface finishes, and excellent straightness. Unlike traditional grinding methods, centerless grinding does not require the bar to be held between centers. Instead, the material is supported between a grinding wheel and a regulating wheel, allowing material to be removed evenly while maintaining consistent roundness and diameter.

Manufacturers such as Industry Metal Supply produce high-quality centerless ground bar products using advanced in-house capabilities including centerless grinding, straightening, chamfering, and cutting. These bars are available in a wide range of materials such as stainless steel, alloy steel, carbon steel, tool steel, aluminum, titanium, and copper alloys to meet the needs of precision machining industries.