friction saver

[High Scale]

I used to do the same thing, but was told to ditch the biner, which I did, I switched to a small mallion. Now I just use a standard Elderid friction saver without the pulley.

 

I like a little bit of friction.

[Jonny69]

vduben, a maillon or a Petzl OK is the best bet. The petzl is an oval carabiner. Some rubber bands or similar would also be good stop the parts from moving about.

 

You would probably not want to use an offest D carabiner in this setup, the cambium saver is effectively trying to pull the carabiner apart when wrapped round a larger stem. Jonathan

[vduben]

i see, i will get a mallion for when i next do it:)

[Marc]

sorry marc i cant picture what your saying. the isc and petzl pullys are pretty much identical apart from the petzl one has bearings

 

Yes its true they are the same design, only I was once told its not safe to tie onto the tab that forms the U on the Petzl pulley?

 

I still use a petzl pulley in this way I do not care as I know it is safe, just as I know using climbing rope as a saw lanyard is safe.

 

Speaking to the guys on the ISC stall at Cirencester about their version of that pulley, they have load rated the tab specifically for tieing the end of your prussik cord onto this to get round those who are so very very anal about such things.

 

Am I right does your ISC pulley have a white marked rating at the tab/or bridge?

[Ax-man]

Looks good, but just a comment from my experience from using ring pulley type friction savers. If you install it from the ground and use it to body thrust up into the tree or footlock the tail of the rope. This set-up will work good as you are basically in line with the friction saver with the climbing rope being basically vertical.

 

When you start to work the top of the tree the friction saver and the climbing rope are more at an angle with the friction saver also being at the same angle of the climbing rope. The cheeks of the pulley will sometimes get "off " so to speak and doesn't line up with the large ring the way it should and the climbing rope doesn't track quite straight adding friction, it works but not as good as climbing on a single pulley like the rope guide. The connecting link in this case the shackle puts a turn or twist on the webbing which is why I think the pulley doesn't run true all the time up in a tree because your full body weight isn't on the friction saver like it is when your body thrusting on the friction saver.

 

Their are many different combinations of pulleys and ring sizes. Yours looks like like a good match of pulley width to the diameter of the large ring to eliminate that binding effect that happens sometimes. I would ditch that shackle as you could have your rope running against the pin and could turn it out, that would not be a good thing unless you can anchor that pin somehow. Even if you wired that screw pin so it wouldn't turn out would be safer than the way you have now.

 

Give it a try and see how it goes, you never know till you try it out.

[Steve Bullman]

good point about the shackle. i used to use a mallion attachment cranked up tight with a spanner. not a good idea to have any device that can be opened out of sight at the top of a tree.

[munkymadman]

if your not going to buy a rope guide at least make your cambium saver adjustable. use a longish section of climbing line put your crab/ring on one end then tie a prussik in the middle of it and put your crab and pulley on that. cheaper again, use it around the smallest of tree tips and on the biggest of trunks.

[John Shutler]

good points everybody.

alex, the shackle is rated to 2 tonnes

i tried to get a mallion but the boat shop didnt have any big enough,i figured do the shackle up tight with a pair of pliers with some locktite on it.

i thought about lossing the shackle and small ring and replacing it with a krab

[vduben]

im gonna get a maillon

[High Scale]

good point about the shackle. i used to use a mallion attachment cranked up tight with a spanner. not a good idea to have any device that can be opened out of sight at the top of a tree.

 

Yep, and you know what those pesky squirrels are like.