... 55indicates motor frame No,. The frame No,is indicated with 55,75,85,130 (The frame No, corresponds with frame Dia. ... structure , its No, is indicated with 01,02,03(Each frame No, is arranged on custemor s ... 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 ...