There are two major classes of milling process: 1  In face milling, the cutting action occurs primarily at the end corners of the milling cutter. Face milling is used to cut flat surfaces (faces) into the workpiece, or to cut flat-bottomed cavities.
The company was formerly known as Progressive Home Insurance Co. and changed its name to Progressive Advanced Insurance Company in May, 2007. The company was incorporated in 1930 and is based in Mayfield Village, Ohio.
In January 2008, Jacobs Field in Cleveland, Ohio, home of the Cleveland Indians, was renamed Progressive Field. Progressive signed a 16-year contract for the naming rights, as well as sponsorship rights to become the Official Auto Insurer of the Cleveland Indians. The agreement costs around $3.6 million per year. (Mayfield Village, Ohio, where the company is based, is a suburb of Cleveland.). In March 2008, Progressive announced its title sponsorship of the Progressive Insurance Automotive X PRIZE and their funding of the $10 million prize purse.