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  #31  
Old 07-14-2013
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Re: Replace cotter pins with welding rod

I have a jar of lanolin for coating the threads of turnbuckles. It works well and is dirt cheap. Won't wash off either. I was surprised at how sticky it was - I expected it to be like a thick soap but it's more like very thick honey - VERY sticky.

I wouldn't use it anywhere else but on those threads it works better than anything I have tried.
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Old 07-15-2013
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Re: Replace cotter pins with welding rod

Quote:
Originally Posted by Roger Long View Post
You'll probably get away with locknuts in casual weekend duffing around but not if you drive the boat hard and frequently as you will in deep water sailing.
I must have a lot of credits in my black box.

I have done a lot of sailing on different boats including several blue water passages and I have made a point of doing my turn buckles with lock nuts and I have yet to have one come loose when I didn't want it to or not come loose when I wanted it to.

I guess I need to start turning to religion or something because my assorted lucky streaks will have to end sometime.

Ah well . . .
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Old 07-15-2013
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Re: Replace cotter pins with welding rod

Quote:
Originally Posted by SloopJonB View Post
I have a jar of lanolin ....
I wouldn't use it anywhere else but on those threads it works better than anything I have tried.
My practice and experience as well.
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Re: Replace cotter pins with welding rod

Quote:
Originally Posted by Omatako View Post
I have done a lot of sailing on different boats including several blue water passages and I have made a point of doing my turn buckles with lock nuts and I have yet to have one come loose when I didn't want it to or not come loose when I wanted it to.
YMMV, as always. However, the locknuts are counter to basic engineering since any strain on the rigging will be in the direction that will loosen them. I'm sure they work most of the time.

For maximum reliability, they probably should be applied with a torque wrench. You need to produce some deformation and stretch in the turnbuckle threads. This gets added to rigging strain. You want about 75% of this preload to come out at maximum rig load. It all just makes my head spin and I could never be comfortable looking at them on my boat.
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Re: Replace cotter pins with welding rod

Plus they can seize up, which is really aggravating when you want to adjust things. I have lock nuts on the lifelines on my current boat and they are seized - It's going to be a job to back them off without screwing the threads.

Some sort of pin is more secure and can't seize.
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