Forums: Climbing Information: Gear Heads: Re: [splish] Sewing your own slings: Edit Log




wivanoff


Jul 29, 2012, 5:33 AM

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Registered: May 23, 2007
Posts: 144

Re: [splish] Sewing your own slings
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splish wrote:
Lift the engine, then I will be impressed.

I used to sew my own slings BITD (1970s). Not because I was cheap, but because sewn climbing slings just weren't available. Most people just tied slings out of 1" tubular webbing with a water knot.

"Off Belay" magazine had an article about sewing your own slings. They showed stitching patterns (multiple rows parallel to the length of the sling), type of thread, stitches per inch, length of splice, etc. (edit: looks like the same article was also published by Cal Magnussen here http://www.caves.org/...ical/nhback/NH03.pdf)

I decided to try that. To see how well I did, I tested one of my sewn splices like this: I used two lengths of webbing. First ends were stitched, second ends were tied with a water knot. I attached the slings between the trailer hitches of two trucks with some steel cable for slack. Used 1/2" steel quick links and Bonatti "D" carabiners. Drove/rolled one truck away to see what would happen.

First test, the water knot broke inside the knot. I retied it. Second test, the water knot broke inside the knot. I retied it. Third test the Bonatti carabiner snapped. After that, I decided my stitching was "strong enough". True, it was a very small statistical sample, but I was pretty confident with what I saw.

Interesting experiment and I used those homemade sewn slings for a while. But, I've been buying sewn slings since they became widely available and it was no longer worth my time to sew.


(This post was edited by wivanoff on Jul 29, 2012, 11:15 AM)



Edit Log:
Post edited by wivanoff () on Jul 29, 2012, 11:05 AM
Post edited by wivanoff () on Jul 29, 2012, 11:15 AM


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