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couchmaster
climber
pdx
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Apr 11, 2012 - 10:54am PT
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Ahhh, it's our fault. User error. OK then....hmmm. At this point I'm glad Mikey already posted. Mikey, you don't know how to jug. It's not the equipment, it's you. LOL.
Actually, I might retry. The lower ascender worked great.....it must not be doing the slipping for others, maybe it just is a bad habit I need to unlearn. Interesting it doesn't occur with all the other brands.
"The issue you are having stems from pulling out on the ascender when you are moving it up, and is something I got very used to doing from other brands (or may seem natural even if you haven’t used anything else). If you pull out on the handle as you move it up, this will not allow the cam to engage until the weight of your body on the ascender over-rides the outward force of pulling on the ascender. Pushing up the ascender and being conscious with technique should alleviate the slippage you are experiencing. There is no design flaw, just a difference in the 4-bar linkage design over a traditional ascender, but the advantages in our mind of the 4-bar really out-weighs the extra bit of time needed to help your technique adapt. I find I do the same thing you are mentioning when I am moving super fast as well, and my technique suffers."
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WBraun
climber
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Apr 11, 2012 - 10:56am PT
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There shouldn't be any slippage at any time on an ascender under normal conditions, except: (ie ice on the rope for example).
I must be stupid to believe one needs to use these ascenders in a certain way to avoid possible slippage.
I've never ever had slippage on any ascender except on iced up ropes since I've used a variety of major brands over the years except for this particular nForce model.
When one cleans overhanging roofs you'll be grabbing those handles every which way.
I'd be sh!tting bricks if I had slippage every time I maneuvered them wrong.
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SGropp
Mountain climber
Eastsound, Wa
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Apr 11, 2012 - 11:25am PT
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So, if I was going to upgrade a 40+ year old set of Jumars, what would you recommend ?
Mostly they would be used for crevasse self rescue or cleaning the occasional aid pitch.
In the alpine I tend to use a set of 7.7mm. ice twins. Only the CMI Expedition is rated to work on a rope that thin. Anyone have any experience with these ?
From the picture they look pretty simple and robust, comparable in price and weight to the Petzl and BD.
I've never had any problems of any sort with the Jumars. The formed plate just seems like a better and stronger way to construct the body of an ascender instead of an aluminum casting.
Is there an actual documented case of a cast aluminum ascender frame breaking in normal use ?
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WBraun
climber
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Apr 11, 2012 - 11:37am PT
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"So, if I was going to upgrade a 40+ year old set of Jumars, what would you recommend ?"
Just use your bare hands, what could go wrong? :-)
There's small idiosyncrasies associated with every different ascender.
Try out some and see which provides you the best efficiency getting off and on the rope along with it's ergonomics (feel) .....
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scooter
climber
fist clamp
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Apr 11, 2012 - 11:58am PT
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They are quite possibly the worst ascenders ever made. I had to use them on a wall once. Slowed me down by probably an hour overall on a speed ascent and caused mucho grief non-stop. Petzl.
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Russ Walling
Gym climber
Poofter's Froth, Wyoming
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Apr 11, 2012 - 12:00pm PT
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So, if I was going to upgrade a 40+ year old set of Jumars, what would you recommend ?
I've never liked them, but go with the Petzl product.... the blue and gold things.
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Melissa
Gym climber
berkeley, ca
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Apr 11, 2012 - 08:47pm PT
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I've only used my partner's while doing stuff around the base (mini-bear-hauling, for example) and at belays/hauls and was bothered by the slip and was otherwise just really clumsy on the fancy jig-jagged thumb shifter. I figure that it's just a learning curve issue, but the Petzl (whose quirks I happen to already know) work too well for me to invest in the struggle with a new brand.
It's like D biners vs. ovals...D's might be a little stronger than the ovals, but if I'm going to sh#t myself every time they shift (even if the shift is my own "user error"), I'm going to stick with the still safe-enough ovals.
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