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FullCircle
Well-Known Member
Re: Keel Bolts - Beneteau
Having just taken delivery of my 9 replacement bolts/washers/nuts for my Jeanneau, at an infinitely more reasonable 102 quid, I can concur that mine are also not much more than 4 inches long.
I concur they dont look long enough, but I guess that is because I havent sat down with a calculator to do the sums.
Having just taken delivery of my 9 replacement bolts/washers/nuts for my Jeanneau, at an infinitely more reasonable 102 quid, I can concur that mine are also not much more than 4 inches long.
I concur they dont look long enough, but I guess that is because I havent sat down with a calculator to do the sums.
swampthing
Well-Known Member
Re: Keel Bolts - Beneteau
A nut to fit that bolt is about 20mm thick. It will take about 12 tons to pull it of bolt. Your bolts could be half as long and still do the job. Bad news is youve been ripped . You couldve got em for a tenner . Theyre just metric hi tensile bolts.
A nut to fit that bolt is about 20mm thick. It will take about 12 tons to pull it of bolt. Your bolts could be half as long and still do the job. Bad news is youve been ripped . You couldve got em for a tenner . Theyre just metric hi tensile bolts.
Heckler
Well-Known Member
Re: Keel Bolts - Beneteau
If you think about it, the nuts an a 3/4" bolt will only be an inch thick so really its not a prob, I know it doesnt seem right but if you have the correct amount of threads engaged?
presume you bought Stingo? Was interested in her but was doing a let JP sweat to try and nick her!! Sorry John!
Stu
If you think about it, the nuts an a 3/4" bolt will only be an inch thick so really its not a prob, I know it doesnt seem right but if you have the correct amount of threads engaged?
presume you bought Stingo? Was interested in her but was doing a let JP sweat to try and nick her!! Sorry John!
Stu
Heckler
Well-Known Member
Re: Keel Bolts - Beneteau
Also another thought, as you have the size of the bolts how about letting us know, I will put on the beneteau site to save anybody else getting ripped
Stu
Also another thought, as you have the size of the bolts how about letting us know, I will put on the beneteau site to save anybody else getting ripped
Stu
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Mudplugger
Well-Known Member
Re: Keel Bolts - Beneteau
Interesting subject: slightly off centre! but in panic mode as to whether had used sufficient 12mm nuts & bolts to hold tabernackle in place (10)! Needed some welding on mast, local specialist ally guy (CAA) approved et al, trogged round, and looking at a Pitt special, stunt aircraft with 600hp under the bonnet, how was the lump attached to the fuselage? FOUR ! 13mm HT bolts.....UR concerned?
Interesting subject: slightly off centre! but in panic mode as to whether had used sufficient 12mm nuts & bolts to hold tabernackle in place (10)! Needed some welding on mast, local specialist ally guy (CAA) approved et al, trogged round, and looking at a Pitt special, stunt aircraft with 600hp under the bonnet, how was the lump attached to the fuselage? FOUR ! 13mm HT bolts.....UR concerned?
William_H
Well-Known Member
Re: Keel Bolts - Beneteau
Yes the longer bolt into a cast iron keel does not give more strength.
After you get more than a few bolt diameters depth into the keel then the strength limiting factor is the bolt diameter.
As already suggested you have a nut on top (or a bolt head) about 1 inch thick and you have effectively a nut in the form of the keel with thread tapped into it which is 3 inches thick. Which is the weakest link? The bolt shaft itself.
Anyway you will be reassured when you draw the old ones out.
Good luck with the bolt change. olewill
Yes the longer bolt into a cast iron keel does not give more strength.
After you get more than a few bolt diameters depth into the keel then the strength limiting factor is the bolt diameter.
As already suggested you have a nut on top (or a bolt head) about 1 inch thick and you have effectively a nut in the form of the keel with thread tapped into it which is 3 inches thick. Which is the weakest link? The bolt shaft itself.
Anyway you will be reassured when you draw the old ones out.
Good luck with the bolt change. olewill
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Heckler
Well-Known Member
Re: Keel Bolts - Beneteau
Thanks for the pix B, was interested but was trying to knock him down before i committed, you know the games we play!! nice boat but i bet it was sad stepping on her for the first time, i used to love reading his stories, i reckon he could make a living writing, are you listening john?
Stu
Thanks for the pix B, was interested but was trying to knock him down before i committed, you know the games we play!! nice boat but i bet it was sad stepping on her for the first time, i used to love reading his stories, i reckon he could make a living writing, are you listening john?
Stu
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Re: Keel Bolts - Beneteau
Brian, she's looking stunning. Well done.
Stu, once I set off again in the new toy, I'll start writing again. There's just no time at the moment, with all the preparations that are going on.
Cheers
John
Brian, she's looking stunning. Well done.
Stu, once I set off again in the new toy, I'll start writing again. There's just no time at the moment, with all the preparations that are going on.
Cheers
John
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Sailfree
Well-Known Member
Re: Keel Bolts - Beneteau
It appears that the bolts were a high tensile steel. Without any prior knowledge of keel bolts I would have expected stainless steel.
Do all manufacturers use high tensile steel for keel bolts that goes rusty?
It appears that the bolts were a high tensile steel. Without any prior knowledge of keel bolts I would have expected stainless steel.
Do all manufacturers use high tensile steel for keel bolts that goes rusty?
Phoenix of Hamble
Well-Known Member
Re: Keel Bolts - Beneteau
Stainless would be very vulnerable to crevice corrosion.... i'd expect them to be HT steel
Stainless would be very vulnerable to crevice corrosion.... i'd expect them to be HT steel