Looking for a peculiar/particular pulley...

[NickfromWI]

I'm trying to improve a climbing system and I need a pulley that I can clip to both ends of...

This one is $50 from CMI. It's a fine piece of gear at a good price, but with a 2 3/8" sheave, it's a bit big for what I need. I basically want, and can't find a double ended micro pulley...just big enough for 1/2" rope.

I though I'd check here. Maybe someone here already knows where to get it before I begin my goose chase.

Ever seen anything like this:

love
nick

 

[wiley_p]

I know that CMI makes the shackle with a sheave on it cause I have one. I'm not aware of the double shackle. They also make the single pulley with the becket on there.

By the by the little shackle pulley works great as a satellite pulley during wide canopy work. 8000# rating, nice and small.

 

[stig]

That is a new expression for me.
What is a "satellite pulley"?

 

[lumberjack]

I'm thinking a redirect?

 

[Bounce]

It's a term I learned from Pete McTree at the west coast climb. In the UK, it is considered a standard piece of equipment that every climber keeps on his saddle. It consists of a small but strong pulley on an equivalent sling. It is used as a quick and dirty false crotch setup for light duty lowering, or as a redirect for a climbing line, or for specialized rigging like the fishing pole technique. Or at least that's how I understood it.

 

[Bounce]

Nick - I've never seen a single sheave micro pulley with a becket on it before. Here is all of CMI's micro pulleys: http://www.cmi-gear.com/catalog/pulleys/micro.asp. I'd be surprised if there was such a thing because the becket means it has to handle more weight than what a micro pulley is usually rated for.

 

[NickfromWI]

Bounce- I respectfully (but uninformedly) disagree. The first pulley i pictured in this thread is rated at 8,500 pounds- the same as the single ended version of the same pulley.

i'm thinking that a double ended micro pulley would be rated the same as the 7,000 pounds the normal micropullies are rated...

love
nick

 

[Bounce]

You could be right - I see that the double sheave micropulley with the becket is the same strength as the single sheave.

 

[CurSedVoyce]

Here's a double but kinda small....

 

[NickfromWI]

That one is good,except it has 2 sheaves. I've founded a lot that are double ended AND double sheaves, but finding a double ended single sheaved pulley is proving tricky.

 

[CurSedVoyce]

I hear ya... Pricey and double but the rating and size were good....

 

[Bounce]

The Petzl Pro Traxion might work.

 

[brendonv]

Nick,

Whats this for?

I was looking...what about taking a CMI Double Sheave Micro Snatch Pulley #pul102 from Wesspur. Take the bolt out, remove the outer pulley, and replace the bolt with one from a standard micro pulley? I dunno, just bored while someones blabbing my ear off on the phone.

 

[Bounce]

HA! It's not me, is it Brendon?

 

[MasterBlaster]

Hahahahahaha!!!

 

[Gord]

http://www.kong.it/pr_pull_new.htm

Kong has one that might be smaller than the cmi one Nick. The reflex its called. Do both ends need to be load bearing rated?

 

[NickfromWI]

Brendon- I'm looking to replace the pulley in this system. As is, the system seems a little clunky and has too many pieces. This one piece will let me get rid of a couple pieces and ditch a few knots.

love
nick

 

[NickfromWI]

Gord- thanks for the reminder I forget about Kong sometimes. Their stuff is not quite as main stream as others. And yes- both ends need to be load-bearing strength.

The Reflex

can take 5/8 rope and it's about 6" long according to kong, but i can't tell if that's just the sheave or if that's the overall length. That's a little bigger than i want...but it just might do the trick. it's plenty strong.

However, on that same page there's another pulley that may do the trick. The Roll...

...There's also the Turbo Roll that is red and black. Not sure of the difference yet...but i'll read the online users info and see.

This pulley is only about 3.75"...perfect size! So i just have to find out if i can clip to both ends..then see how to get one here in the US.

Thanks for the tip!!!!

love
nick

 

[Gord]

The other thing you might be able to do Nick is to use this cmi pulley and clip the lower attatchment biner though the sideholes using a william biner or a shackle and then the upper biner in the inline configuration.


link

 

[NickfromWI]

i've been looking at that pulley trying to see if there's a way to make it work. Anyone have one if these:

 

[SkwerI]

i've been looking at that pulley trying to see if there's a way to make it work. Anyone have one if these:

If you're hauling the setup up into the tree using the bull rope, then why are you going to such lengths to save an inch on the pulley diameter? Cross loading one of those tiny aluminum pulleys is worse than cross loading an aluminum carabiner. Some of you guys go ballistic over the thought of side loading a carabiner but you're willing to hang an entire life support system off the cross loaded becket of a tiny aluminum pulley? WTF?

I suggest you use the nice stainless CMI pulley in your first post and be comfortable knowing there is some safety margin in the system.

 

[NickfromWI]

I'm not hauling it up as seen in the drawing. Like i said- i'm changing the setup to make it more streamlined.

Thank you for the safety warning.

love
nick

 

[woodworkingboy]

Can I get a definition of "cross loading" please.

Thank you.

 

[rumination]

Cross loading in this context means to load a piece of gear in an orientation it was not meant to be loaded. For example loading a carabiner across the gate, as opposed to along the spine as it was meant to be loaded.

 

[woodworkingboy]

So, it's just a general term....I see. Gracias, Leon.