rocco611
Silver Member
the rotor pulley snapped on my EF155 flail mower. I contacted Betstco in Oregon , they can't supply a replacement, I would have to buy a new mower. I attempted to drill out the plug welds and remove the stub shaft from the rotor only to find that it is also welded around the inset face then machined. I contacted a local machine shop and they informed me that if I repaired it as designed they would not be able to balance it, due to the small diameter of the end shafts (one inch O.D) and the fact they are inset into the rotor housing. the shaft is supported by two UC205 radial insert bearings the housing of which mount inside the side plates of the flail mower and fit inside the recess of the rotor shaft. the one inch shaft steps down to about 13/16 where the pulley is mounted. The center of the shaft is drilled for the grease fitting , then cross drilled at the bearing location, that is where it sheared off. I am thinking of building a new rotor, with 1 1/4" stub shafts then mounting the bearing retainers on the outside of the mower side plates. this way there is no need to drill and cross drill the shaft, I dont have to inset the stub shafts then machine the end of the tube for the bearing housing to fit in. much simpler to build, the shop can balance it . I am not worried about the increased width .suggestions appreciated.