CUMI - Abrasive manufacturers in India - Cumi MurugappaCUMI introduce new products such as CUMI Flex, CUMI White, CUMI Zing. . GRINDING WHEELS . Carborundum Universal Ltd is expanding its reach in Europe with a step down subsidiary for marketing its products in the Czech Republic.carborundum universal grinding stone aa120 grid,Abrasive Manufacturer India|Abrasives for . - Cumi MurugappaCUMI was founded in 1954 as a tripartite collaboration between the Murugappa Group, The Carborundum Co., USA and the Universal Grinding Wheel Co. Ltd.,.