Ameridrives Couplings began manufacturing in 1928 as the Mechanical Drives Division of Zurn Industries. Through the years Ameridrives Couplings has pioneered many improvements to keep in step with changing technologies of power transmission equipment. In the early 1950's Ameridrives Couplings patented the Amerigear fully crowned gear tooth coupling, the secret of superior mechanical power transmission. The basic gear coupling design was the stepping stone for the development of reliable and economical Amerigear Mill Spindles.