Anyone out there with parts books or manuals on light duty IH disks built in the 1960s. I have a 16 blade, tandem, single point fast hitch disk, bought new with a 1963 Farmall 140. This disk has 7/8" square arbor bolts. The bearings are two piece insert type of gearsable bearing. As the disk had several worn or broken blades and badly worn bearings I decided to restore it. The disk blades are available from several sources including CaseIH. The bearings are no longer available. Someone had obvoiusly run this disk for days without greasing. If I am going to spend much money on this disk, I'd like to increase it to 20 blades. I know where there is a doner disk and the guy says it has good bearings. This would also give me the extra blades and spacers. One thing is holding me back. I have a 1968 buyers guide, which lists a model 120 disk available as 1 point fast hitch, 2 point fast hitch or Cat I 3 point hitch, 5.5, 6.5 and 7.5 foot sizes. This 120 model is listed in the buyers guide as having 1-1/8" square arbor bolt. What I'm wondering is just maybe the disk I have is a Cub disk and was never built any larger than 16 blade or about 4.5 feet wide. Did IH ever use the 7/8" square arbor on 20 blade and larger disks. Just curious why, by 1968 IH went to 1-1/8 square arbor bolt? I really don't want to spend much on this disk if it wont stand up as 20 blade disk?
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