... s requirement in order.)3.Mounting Model 1.Housing Mounting: A5(single shaft extension),AA5(double shaft extension) and frame No,(55 ... -130). 2.Flange Mounting:A3(single shaft extension),AA3(double shaft extension) and frame No,( 55 ... -130). 3.Foot Mounting: A1(single shaft extension),AA1(double shaft extension) and frame No,( 55 ...