Imported OEM equipment can often have a flange face that is different from it’s motor’s frame size. LEESON now stocks metric (IEC) reduced diameter B14 flanges so you can put a 71 frame flange on an 80 frame motor for example. Flanges come pre-fitted with oil seals and have all the necessary hardware for easy field mounting.
Unit of Measure

Motor Frame

N/A 71

B14 Flange Frame

N/A 63