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.010 bow in prop shaft, repairable?

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StuW View Drop Down
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    Posted: May-11-2018 at 5:03pm
I am in the process of performing some engine work on my BFN and while the drivetrain is out I pulled the prop shaft to have the straightness checked. The machine shop I brought it to found it to have a "bow" of .010" out from being straight, clearly not within the .002" tolerance of a new A.R.E. shaft. The shop I went to said they could not straighten it to within a .002" tolerance because of how close it already was. Assuming the bow is not localized to one of the ends, should I try another shop or be looking for a new shaft?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote TRBenj Quote  Post ReplyReply Direct Link To This Post Posted: May-11-2018 at 5:06pm
Possibly both!
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Riley View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Riley Quote  Post ReplyReply Direct Link To This Post Posted: May-11-2018 at 5:21pm
We had one straightened out last year that was .008". It cost $125 to have done. It was more than I was inspecting. Something to think about when pricing out a new shaft and coupling.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote JoeinNY Quote  Post ReplyReply Direct Link To This Post Posted: May-11-2018 at 5:34pm
Originally posted by Riley Riley wrote:

We had one straightened out last year that was .008". It cost $125 to have done. It was more than I was inspecting. Something to think about when pricing out a new shaft and coupling.


How straight did they say it ended up?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Riley Quote  Post ReplyReply Direct Link To This Post Posted: May-11-2018 at 5:46pm
.002"
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Post Options Post Options   Thanks (0) Thanks(0)   Quote StuW Quote  Post ReplyReply Direct Link To This Post Posted: May-12-2018 at 12:57pm
Originally posted by Riley Riley wrote:

We had one straightened out last year that was .008". It cost $125 to have done. It was more than I was inspecting. Something to think about when pricing out a new shaft and coupling.


$125 does seem a little steep. With a 10% discount applied I"m at $380 from Skidim, which suddenly seems more realistic.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote gt40KS Quote  Post ReplyReply Direct Link To This Post Posted: May-12-2018 at 3:13pm
My 2 cents - 380 vs 125 is a big difference, yes. But IMO the double taper is worth the $. I'd just spring for the new shaft.
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