I made one a couple of years ago that has a morse taper and a shaft rather than being inside a sleeve. I put a spring on it to keep tension and will see if I can do the same here. When you have a spring maker in your lab, you can do those kinds of things.
Any other projects that need springs with 3/8 inch ID or larger please send my way.
Drop me a PM with your email, I have a high res PDF of my drawing I can send you, can't seem to attach it here using my phone and I don't have a PC at the moment.
It's not the destination but the journey you take to get there that matters.
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