Sybarite
Well-Known Member
Americans frequently use adjectives as adverbs.
Mantus anchor anybody?
- Thread starter Sybarite
- Start date
macd
Well-Known Member
lustyd
Well-Known Member
A shackle is not a bolt though, is it? A shackle puts zero load on the thread and a mousing wire can be used to stop the load bearing pin coming loose. Bolts on the other hand can and do come loose, especially when they have only been tightened for a temporary use such as this. After all, the tighter you do them up the harder it will be to stow the anchor when you retrieve it.
macd
Well-Known Member
A shackle is indeed not a bolt, although it's not much use without its pin which is most certainly a bolt. And there's no reason a hex-head bolt can't be moused if desired.
True, a shackle puts little or no tensile load on the thread of the pin. But that's not to say bolts can't handle that and regularly do. Except, perhaps, the ones holding on Bavaria keels
I'm not sure breaking the anchor apart to stow it when retrieved would be on many people's minds: in the case of a main bower that would just be for the likes of winter storage or shipping. Mantus' web site speaks only breaking down their hooks when carried as spares, not as a routine measure for a primary bower. My anchor's held together by a (non load-bearing) bolt, and never comes apart except periodically to check it. 'Temporary', it isn't -- and wouldn't be even if temporary weren't bad practice for any fastener in critical applications.
lustyd
Well-Known Member
If only that's what I'd been saying eh? If people won't generally take it apart then why weaken it by letting them?
Ariadne
Well-Known Member
My Fortress is held together by bolts, never come apart yet and that has been under some pretty tidy loads when it was our main anchor.
I'm sure some thread-lock and a centre pop would solve the potential undoing of the nut!
I'm sure some thread-lock and a centre pop would solve the potential undoing of the nut!
Neeves
Well-Known Member
I think MacD must use a Spade, and its the joint of the Spade that takes the load. Mantus claim to use high tensile bolts, time will tell if they are strong enough. I'm sure they have done the engineering. They are 'locked' using spring washers. Why they did not bring the shank up through a slot, so that it was self locking - no idea. But Lusty, you are quite happy to rely on a welded anchor, shank welded to fluke (and for most its a butt weld) - given your scepticism why do you suppose the weld of your anchor is good enough? Selling them disassembled might have logistical advantages (making them cheaper?). It does allow you to carry and store one relatively easily and in the horrible event you bend the shank you do not need to replace the whole thing (though you might if it bends easily). Its an interesting concept.
DJE
Well-Known Member
Plenty of steel bridges and buildings held together with bolts. Not moused either!
And the varying loads that you are worrying about can be bad for welds too!
