Author Topic: Hand Jammer Krab  (Read 2032 times)

Offline LarryFatcat

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Re: Hand Jammer Krab
« Reply #25 on: November 26, 2019, 12:02:34 pm »
screwgates usually unjam with a little weight on them and did you
read Backstory 2:
http://welshrandomadventures.blogspot.com/2014/09/the-fall.html
from above?

though back to the point
I recommend an even loading (straight up and down like an oval or even D) lockable krab for the hand jammer attachment

UK Caving

Re: Hand Jammer Krab
« Reply #25 on: November 26, 2019, 12:02:34 pm »
Warmbac

Offline Fulk

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Re: Hand Jammer Krab
« Reply #26 on: November 26, 2019, 12:24:41 pm »
Quote
Backstory 2:
Food for thought there, Larry; thanks for posting the link.

Offline pwhole

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Re: Hand Jammer Krab
« Reply #27 on: November 26, 2019, 12:42:10 pm »
I use a maillon as a connector - lasts for years and cheap to replace. I have a cheap steel krab clipped in for passing sharp rebelay anchors - an ally screwgate would be far lighter, but they're easily damaged on anchor plates, and a steely makes it a handy 2:1 accessory if needed - and a spare cowstail as the safety link is dynamic.

Offline Mike Hopley

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Re: Hand Jammer Krab
« Reply #28 on: November 26, 2019, 02:56:04 pm »
I recommend an even loading (straight up and down like an oval or even D) lockable krab for the hand jammer attachment

Agreed. This is one of my two recommended options. The other one is "just clip your safety cord / long cowstail directly into the jammer".

Quote
a steely makes it a handy 2:1 accessory if needed

I assume you mean lifting someone with a 2:1 mechanical advantage? What is the advantage of a steel carabiner here?

Offline alastairgott

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Re: Hand Jammer Krab
« Reply #29 on: November 26, 2019, 05:03:56 pm »
It jingles more as he walks on the streets of Derbyshire  :thumbsup:  2 for 1, we can keep tabs.

Offline pwhole

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Re: Hand Jammer Krab
« Reply #30 on: November 26, 2019, 06:53:22 pm »
Or just climbing back up a bit on a nasty caving descender - it can help sometimes. I just find ally krabs aren't very durable for this sort of thing, especially rope-rub. I once had to use an ally snapgate as a braking krab on a SRT trip and it had a groove in it when I got back. I've never had to do a person-lift underground, but it always worth having the option.

Offline LarryFatcat

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Re: Hand Jammer Krab
« Reply #31 on: December 05, 2019, 01:16:49 pm »


Quote
a steely makes it a handy 2:1 accessory if needed

I assume you mean lifting someone with a 2:1 mechanical advantage? What is the advantage of a steel carabiner here?
[/quote]

perhaps he means a standard oval steel (like used on a Stop) which are great for use with a pulley

 

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