Optimal hammer design and placement will provide maximum contact with the feed ingredient. Hammer mills in which the rotor speed is approximately 1,800 rpm, should be using hammers which are around 25cm (~ 10 inches) long, 6.35cm (~2.5 inches) wide, and 6.4mm (0.25 inches) thick.
For the labor union, see International Brotherhood of Teamsters. Teamster driving a team of six horses at the Oktoberfest in Munich, Germany. A teamster, in modern American English, is a truck driver, or a member of the International Brotherhood of Teamsters, a labor union in the United States and Canada. Originally, the term teamster referred to a person who drove a team of draft animals, usually a wagon drawn by oxen, horses, or mules.
The American Federation of Labor (AFL) had helped form local unions of teamsters since 1887. In November 1898, the AFL organized the Team Drivers' International Union (TDIU). In 1901, a group of Teamsters in Chicago, Illinois, broke from the TDIU and formed the Teamsters National Union.