Barnes International Inc. is involved in the manufacturing of a range of coolant filtration equipment to serve the needs of grinding, honing and cutting machine manufacturers and end users. Located in Rockford, Ill., the firm operates from a 160,000-square-foot facility. Barnes International Inc. is one of the global leaders in the design and manufacture of precision metalworking machinery and industrial coolant filtration equipment. Operational since 1907, it is also one of the leading full solution filtration companies in the United States.