has anyone thought of using a 56C motor adapter for bolting on a 56C motor to the D80D input of the IH? these motors seem cheaper and much more plentiful than the D80D counterparts. is what i'm proposing totally off the wall? what are the pitfalls of doing this? is there a cheaper source for the D80D motors? i would like to put a 2-3 HP 3400 RPM motor on top of my mill and a VFD is optional but i found a 3400 RPM 3 HP motor that is single phase 220 and was thinking of using this. any comments on the higher speed and skipping the variable speed drive?
I would suspect that the bigger motor will be in the same catagory as the stock mill, sngl phase means no vfd usage, so, it would be gear box only and for most of what you would do just select your rpm to the lower than recommended. as to fitment to the machine i'm not sure but i'll bet it could be made to sit there and stay put. I studied the shaft in the machine when i did my conversion, and saw that there are two ways to fit the shaft's together, one is turn shaft to fit as recomended and the other is to press the collar off of shaft in machine, bore and rebroach it then press it back together and have it tig welded very carefully solid. I came close to doing it that way, but it seemed easier at the time to just turn the end of the motor shaft and loose any warrantee they had. I think you'll need to make an adapter plate to mount between motor and machine mount but not sure there.
IH v-3 early model owner
All you need to do is turn down the shaft and put the keyway on the other side. I didnt have a lathe so I went to a machine shop and he charged me 20 bucks 3hp leeson 3 phase motor and an automation direct VFD. I can now go to 3400 approxamately. the mounting plate fits perfect.