How To Replace your Lower Column Bearing: Better and Cheaper!!!
Mine is solid 1 dimension, no transition up to 1 inch... I am going to order a 7/8 diameter bearing as well SER205-14 so it will be a tighter fit... They don't make that style of bearing in a 3/4 shaft size with 52 mm outer size..
being that it is really just positioning the shaft in the center of the tube, it should be fine. perhaps a chunk of 3/4 copper water pipe as a sleeve might work.