Spiderjack 2.1 Dyneema issue

[Lancstree]

This may well need to turn into a warning thread.

 

First thing I noticed was a bit of wear on the dyneema sling near the little anchor ring. Then it was apparent that the red adapter that contains the sling was very loose.

 

This is what I think has happened. The red adapter ring has come loose (unknown reason), then this has allowed the anchor ring at the end of the sling to grate up against the edge of the spiderjack body causing it to form a sharp edge, which in turn has been cutting away at the dyneema sling. I inspected our second climbers setup which is exactly the same but has only been used in an aerial rescue practice - so nearly new. The way we have the rubber stoppers on the carabiner might explain why the adapter has come loose. The pictures below will show this.

 

Anybody with a spiderjack 2.1 dyneema, be extra vigilant when inspecting it.

[Lancstree]

Sorry about the quality of the pics.

 

Here you can see the arrangement of the rubber stoppers and how it is causing the sling to come slightly out of alignment. Could be a cause of the red adapter coming loose. Notice how far the adapter has come out. When the main lever is depressed during use the sling comes into contact with the edge of the spiderjack casing

Edited August 1, 2012 by Lancstree
More detail

[Lancstree]

A bit closer you can just about make out the wear on the sling. It was enough for me to be concerned about and not climb on it. The pictures do not show it very well but there is glazing and fraying on about half the width of the sling.

[Lancstree]

Here's another attempt to photo the wear on the sling

[Lancstree]

Notice the edge on the casing formed by the anchor ring coming into contact with it.

[silky fox]

Good Heads Up Lancstree...i inspect my S.J before and after use. I have no wear on my Dyneema whatsoever but don,t use the rubber stoppers in that configuration...Thanks for posting!

[Lancstree]

The spiderjack is upside down here but we are holding it to show the ring coming into contact with the casing.

[Lancstree]

I would like to add that I noticed the start of the same wear on the second climbers spiderjack casing but the dyneema was fully intact. I changed the arrangement of the rubber stoppers so that one was in between the anchor ring and the main spiderjack connection. During use this was more in-line and the casing did not seem to contact the sling anywhere near as much.

[Lancstree]

Silky. Have you ever had to tighten the screw for the ring that captures the dyneema? Can you show a picture of how you arrange the rubber stoppers? If it is the case that the arrangement of the stoppers was to blame then people need to know.

[James Atkinson]

you need to put one rubber stop to left of the spiderjack arm, the othere between the arm and dyneema ring loop, this keeps it all straight, like you have it is keeping the sling in at a angle, ill take a pic in a bit