Shackle bending

[Spirit (of Glenans)]

Thanks for everyone's input. Seems a successful adjustment with the help of 2 wood blocks, a vice, and a nut of the right width to ensure I didn't over squeeze. View attachment 117542
All done very carefully in small increments until it fitted just right. Surprising how much faffing about it was to squeeze just 2mm accurately.

And let that be an end to it! Go on, all of you, about your business?

 

[Refueler]

See the smiley? He was joking. Effecting your proposal will weaken the traveller. Definitely. Permanently.

mmmmm suggest you go back and see that Rotrax actually gave me a thumbs up .......... maybe its not I who got his post wrong ??

 

[rotrax]

See the smiley? He was joking. Effecting your proposal will weaken the traveller. Definitely. Permanently.

The traveller has two slots already. It is already weaker there than where not slotted. As designed, the slot weakness was allowed for.

In my view, after 50 years of fabricating, repairing and getting further useful life out of old crap if the OP is unhappy about tweaking the shackle - and, lets be honest, a tweak is ALL it needs, albeit a careful tweak - widening the slot if carefully done will have litte effect on its strength in the real world.

The smiley I introduced was sarcasm at a three page thread on what to me is an insignificant bit of fettling.

If it were my boat the job would have been done quicker than posting the OP.

Soft jaws in the vice, vernier set at slot width, squeeze the shackle narrower, using an adjustable spanner tweak the ends parallel, check the width, make sure the pin fits, install.

Simples.

 

[PabloPicasso]

Yes, really I should have removed the old traveller and track, reinforced the deck, and fitted all new parts. Anyone care to take a stab at the cost of doing that?

 

[RichardS]

Thanks for everyone's input. Seems a successful adjustment with the help of 2 wood blocks, a vice, and a nut of the right width to ensure I didn't over squeeze. View attachment 117542
All done very carefully in small increments until it fitted just right. Surprising how much faffing about it was to squeeze just 2mm accurately.

A good job, well done.

The angle grinder idea was madness so sanity and respect has prevailed, one could say.

Richard

 

[Stemar]

And let that be an end to it! Go on, all of you, about your business?

Not quite. There's still this bit - the most important one

Then go sailing and celebrate the repair with a nice glass of something in your preferred anchorage.

 

[Neeves]

Yes, really I should have removed the old traveller and track, reinforced the deck, and fitted all new parts. Anyone care to take a stab at the cost of doing that?

Crowd funding

Jonathan

 

[PabloPicasso]

Yes, replacing parts like this could be 600 quid, or more perhaps?

 

[thinwater]

And let that be an end to it! Go on, all of you, about your business?

. Not likely.

 

[[185615]]

Yes, replacing parts like this could be 600 quid, or more perhaps? View attachment 117548

Certainly the best if not the most ridiculous justification I have ever heard to do what seems the simplest and best engineering solution.
You have been mislead my boy, buts thats your choice.
Why not have a word with a manufacturer as previosly suggested and get their viewpoint?
Looking at the shackle you have now bent it is clear the arch is no lnger symmetrical, and it is precicely at that point where the most stress will be focused on, which you have now pre-stressed in anticipation?

 

[[185615]]

Not quite. There's still this bit - the most important one

For safety's sake stay in it.

 

[anoccasionalyachtsman]

Certainly the best if not the most ridiculous justification I have ever heard to do what seems the simplest and best engineering solution.
You have been mislead my boy, buts thats your choice.
Why not have a word with a manufacturer as previosly suggested and get their viewpoint?
Looking at the shackle you have now bent it is clear the arch is no lnger symmetrical, and it is precicely at that point where the most stress will be focused on, which you have now pre-stressed in anticipation?

He'll need a Ouija board, IYE went out of business in the late 90's.

 

[Daydream believer]

Exactly ..... I suggested opening up the slots ages ago ... solves all.

Then when the replacement breaks & he finds the correct one it will be too slack to fit.
Plus the pin will have less bearing to fit against & one would be machining part of the pullies away & getting nearer to their threaded socket points.

 

[Daydream believer]

Thanks for everyone's input. Seems a successful adjustment with the help of 2 wood blocks, a vice, and a nut of the right width to ensure I didn't over squeeze. View attachment 117542
All done very carefully in small increments until it fitted just right. Surprising how much faffing about it was to squeeze just 2mm accurately.

Well that has killed that post good & proper-- Now we will have to find something else of irrelevance to pontificate

 

[Neeves]

Well that has killed that post good & proper-- Now we will have to find something else of irrelevance to pontificate

Is that meant to be a difficult problem

Choices, Choices

Jonathan

 

[Refueler]

Then when the replacement breaks & he finds the correct one it will be too slack to fit.
Plus the pin will have less bearing to fit against & one would be machining part of the pullies away & getting nearer to their threaded socket points.

Overstatement on your part methinks .... look carefully at the photo .. the amount of material to remove from the slot in no way compromises the unit. If we were talking larger adjustment to slots - then yes I agree. But the amount is basically equal to one run with the grinder wheel !!

The amount removed does not get anywhere near the other fixings ..

Methinks you are just arguing for arguing sake.

 

[RichardS]

Well that has killed that post good & proper-- Now we will have to find something else of irrelevance to pontificate

As long as posters are polite and respectful towards each other, it's all good whatever the subject.

Richard

 

[PabloPicasso]

Perhaps PBO could test various makes of shackle to test for strength, corrosion resistance, deformation resistance etc.

 

[greeny]

Perhaps PBO could test various makes of shackle to test for strength, corrosion resistance, deformation resistance etc.

and then bend them a bit and test them again.

 

[Refueler]

Perhaps PBO could test various makes of shackle to test for strength, corrosion resistance, deformation resistance etc.

I think PBO / YBW would err on side of caution and only conduct any test in accordance with manufacturers guidance. Can you honestly see any manufacturer agreeing to such malpractice with its product ?

Even if PBO / YBW were to conduct such - can you imagine them accepting responsibility when some clown exceeds the test results and product fails ?