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Matt M

Trad climber

Alamo City

Aug 24, 2010 - 12:20pm PT

It all depends on what the manufacturer uses to cover the bare cable.

(TTBOMK) BD uses Nylon slings on its cams because it uses an Acrylic tubing, through which a Dyneema sling would quickly and easily cut.

(IIRC most other cam manufacturers use a Urethane tubing.)

Not true. BD Used nylon in the previous version of Camalots as well (no thumb loop). My guess is BD uses nylon because it's more durable over the long rung than dyneema (see above re: faster loss of strength in skinny dyneema)

The tubing material used makes no difference. In testing the C4s, the thumb loop would collapse and CUT the sling BOTH Dyneema and Nylon. BD uses a double layer of sling to prevent loops deformation. (Metolius does this as well on the TCUs I think)

See Here for the full explanation: http://www.blackdiamondequipment.com/en-us/journal/climb/all/qc-labreslinging-camalots-and-c3s

slobmonster

Trad climber

OAK (nee NH)

Aug 24, 2010 - 02:40pm PT

Yeah I'm with you; the double-layered webbing is quite significant.

I might have been regurgitating an explanation given to me by another cam manufacturer, but I do recall something about the tubing used to cover the cable. Sorry to obfuscate this ridiculous discussion further.