Torque tube inner shaft kit

[rotorwrench]

They would be easy to reverse engineer if a person has one in hand. I purchased one of the old type ends from JM 35 Sedan. If I had a horizontal mill and an index, I could probably make one but then again it might be easier to take it to a larger machine shop and let them do it. They have the big stuff that can easily cut the splines plus most of the tooling to make life easier. I don't know what it would cost but at least it wouldn't be unobtainium.

Mention of solid shafts without a center bearing on post 11, It depends on shaft construction and length of shaft. The model A types got away with it because it was part of the pinion and it was short but FoMoCo found later that they whip too much when suspended between pinion and U-joint. I've seen this on a lot of solid shafts and even some hollow ones. The helicopters generally always have segmented shafts with multiple carrier bearings or they have a center damper bearing on long drive systems like for tail rotor drive.