Heres what happens when a pulley is shockloaded.

Re: Heres what happens when a BBS is shockloaded.

[ QUOTE ]
.Arrgh, you beat me to it Tree Co. Can't type fast enough.

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You can't type quick?

I found an earlier version of this software on sale at a store. Not only will your typing speed increase, you will learn to type without looking at the keyboard. It's good stuff.

http://www.broderbund.com/jump.jsp?itemI...iProductID=1045

I would never suspect a pulley would look like it was split with a maul and wedge when overloaded. I can't even envision that sort of damage occuring. Weird things happen, thanks for sharing.

Joe
 
Re: Heres what happens when a BBS is shockloaded.

now thats nasty, ive beaten my pulleys up a little too much in the past, too much guts not enough know how kinda scenario, now i switch over to blocks whenever i do anything other than limbs, its a little more time but well worth the effort, i hope no one was hurt brother

if you look in your sherrill catalog there is a green growth log chart available, i suggest you study that thing, i know i have, you dont realize how much the log your cutting can weigh til it might be too late there are also rigging softwares available, ive never used them but have heard good things
 
Re: Heres what happens when a BBS is shockloaded.

speelyei;

Why did you change 'pulley' to 'BBS' in the title of this thread? And what does 'BBS' mean?

Mark C. changed 'BBS' back to 'pulley' as I was typing this. I'm still curious what BBS means.


Mark, what do you mean it cut the 'pin' off? The axle of the pulley, or whatever you were using (carabiner, clevis) as the connector to the sling?
 
Re: Heres what happens when a BBS is shockloaded.

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Mark C. changed 'BBS' back to 'pulley'

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Actually Mahk, I just replied to the first post in this thread.
smile.gif
 
Re: Heres what happens when a BBS is shockloaded.

Hmm... Mark C. what do you think about using them for light wood or re-directs? Because this discussion is making me re-think my opinion.
thinking.gif
 
Re: Heres what happens when a BBS is shockloaded.

I've been using this same pulley for years to get a 2/1 advantage with the Maasdam rope puller. I set a 5/8 rope in the tree and place this pulley at a good mid point and set up the Maasdam with 1/2 inch rope. One end of the 1/2 rope gets tied to an anchor tree at it's base and the other end to the Maasdam.

It's worked flawlessly in this application.

I also use it for light rigging in the tree. It is not built for heavy rigging.
 
Re: Heres what happens when a BBS is shockloaded.

i was making a joke, or being a jerk, depending on how much maliciousness you want to read into it. BBS stands for Bulletin Board Service.
 
Re: Heres what happens when a BBS is shockloaded.

I personally don't like em much for rigging. Buried in a MA system I am alright with. Rigging with them I am against for two reasons: 1) Paper thin side plates bend and/or cut the pin. 2)The plates are sharp and can cut the rope (or damage it) especially when using more than one.

I'd rather use a shackle or natural crotch for light rigging and redirects.
 
Re: Heres what happens when a BBS is shockloaded.

Svein, True, but he did say "light" rigging. We "shackle" ourselves into harnesses with tight bend ratios. The entire rockclimbing and vertical rope world hang their lives on tight bend ratios. Knots function due to tight bend ratios.

Big sheaves keep rope at its strongest and make it last. Tight bends are how rope gets put to work. Every now and then I find myself thinking "For pity's sake- rope is a WEAR item. Run it over a natural crotch and get the silly job done!"
 
Re: Heres what happens when a BBS is shockloaded.

Rescue pulleys are great for what they were designed for - top roping (lowering wood below the anchor) and re-directing.

I've seen bent rescue pulleys routinely on equipment inspections - they aren't meant for shock loading.
 
Re: Heres what happens when a BBS is shockloaded.

My brother in law is a Mould Maker and he is required to supply his own tools except the 'consumables' like cutting tools and such. These are paid for by the company. A similar philosophy Stumper.
 
I hope you guys don't get another pulley to replace that one.

That numb-skull climber is going to hurt or kill himself or someone else.

The wood looks like Osage Orange (Maclura pomifera) to me. Heavy heavy wood. Or something else in the Mulberry family (all heavy). That peice looked too big to me.

I don't care if the port-o-wrap locked up. Shouldn't have been using a pulley like that.

I have a stainless steel one like that, but only use it for my zip line into my pond.

I can picture the thin sides cutting a misplaced lanyard too. As Mark was saying.

Get the guy some good tools. Get him a block. They come apart with a twist of the pin. Fast safe and reliable.

(Picture of zip line at my house with what we do with that pulley)
 

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Re: Heres what happens when a BBS is shockloaded.

Boy! That is ugly. Glad everybody's ok.

And, ditto what Mahk said. It's simply amazing to me how much force shock loads can generate.

Of course in this particular case, it would seem the shock load probably wasn't so high, since the pear link likely wasn't closed.
 
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