R_O_M
Guest
We were lucky as we acquired the splined rotor drive shaft from a N series gearbox. I think the rotor gearbox drive shaft splines are all interchangeable through the AGCO_ Allis rotary series. This particular shaft had been twisted off inside the gearbox! The mind boggles at the thought of twisting one of these off and, NO, it wasn't any of our doing! A bearing on the splined shaft and a lump of wood to rest it on, the other end using the stop sign end plate and bearing and no problems to balance. Instead of a large bearing with a lot of resistance, I made a stand with two small bearings which supported the shaft in the V formed by the bearings. Much less rolling resistance and easier to balance than the large bearing. Instead of a splined shaft, a shaft could also be machined to fit neatly inside of the diameter of the splines in the rotor. Keep the shaft support bearings as close as possible to the splined housing as there is a very small amount of sag from clearances between the splines which can make it more difficult to get a good balance. Make sure All dirt and etc is thoroughly cleaned from inside of the bars. A good balance is when adding a good 1_2" bolt washer is enough to make the rotor slowly roll over.