I am the proud new owner of an old Logan 10 model 1875). I am in the process of tearing it down as it had a few more problems than i knew of at first. I knew on purchase that the bull gear was broken. I have attached pictures here. I am going to try to repair this gear myself. I have done alot of reading and will do more before i start on the gear. I have ordered off of Ebay a #2 (55-135 tooth) 14 DP gear cutter for $20. I thought i was really smart until i realized that this is a 7/8" hole gear cutter. I have not been able to find a 7/8" arbor( i hope that is the correct term for the shaft to drive this cutter). I have been told (by the vendor Victor machinery ) that 7/8" is old technology and arbors for this aren't made any more, only 1". Now if i had a lathe Icould turn the 1" down to 7/8" BUT. Any good ideas on how to reduce the dia of a 1" R8 Stub Milling machine arbor to 7/8" using my mill? Please keep in mind that I am a self confessed brand newbie to this. I know only what I have read. I have a 16" Mill/Drill , but I haven't used it much. If i can accomplish the shaft reduction, then the plan is to set up an angle plate on the mill and using a hub that I have locate and bolt the bull gear to it. I will then bolt the gear from the back gear to mesh with the bull gear and lock the back gear in place so it can't turn once i am set right for the cutter. After I cut the first repair I would then slide the bull gear out and turn one tooth and then cut the next. If this makes sense let me know or tell me what obvious glaring error I am making here. I do not have a dividing head at this point and don't want to buy one for this. Although I would rather spend the $410 on a dividing head and repair my gear than just buying a new bull gear with that money. At least I would have the dividing head for future projects.
The change gear box was also crashed, but if I can get the bull gear fixed then I can adapt some stock gears from browning/boston to replace the bad gears I have. I have ordered new bushings so hopefully it won't crash/trash again without my help! A total of 8 teeth on the bull gear are MIA. Any advice or comments would be appreciated. Thanks