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What size rod end are you using David? Is it an M12 or M14 thread? What size bolt through the eye?
I don't know if I'd do a tapered bolt. I've never been a fan of machining bolts down. the rolled threads on the bolt are much stronger than cut threads as they don't create stress risers. Also the flux of the metals grain stucture flows around the rolled threads. I'd probably drill out and sleeve the hole for a straight bolt.
Check out Carol Smiths book Engineer To Win.
I've drilled mine out to 5/8" and I'm using a high tensile 5/8' UNF bolt. The rod has a 5/8" hole and a 5/8" Left Hand UNF thread.
Cheers
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Mike Murphy
Melbourne Australia
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